./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer --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 bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:21:30,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:21:30,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:21:30,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:21:30,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:21:30,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:21:30,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:21:30,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:21:30,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:21:30,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:21:30,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:21:30,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:21:30,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:21:30,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:21:30,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:21:30,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:21:30,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:21:30,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:21:30,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:21:30,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:21:30,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:21:30,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:21:30,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:21:30,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:21:30,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:21:30,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:21:30,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:21:30,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:21:30,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:21:30,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:21:30,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:21:30,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:21:30,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:21:30,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:21:30,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:21:30,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:21:30,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:21:30,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:21:30,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:21:30,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:21:30,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:21:30,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-12-01 15:21:30,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:21:30,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:21:30,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:21:30,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:21:30,848 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:21:30,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:21:30,849 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:21:30,849 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 15:21:30,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:21:30,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:21:30,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:21:30,851 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-01 15:21:30,851 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-01 15:21:30,851 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-01 15:21:30,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:21:30,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-01 15:21:30,852 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:21:30,852 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:21:30,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:21:30,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:21:30,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:21:30,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:21:30,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:21:30,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:21:30,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:21:30,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:21:30,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:21:30,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:21:30,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 [2020-12-01 15:21:31,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:21:31,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:21:31,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:21:31,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:21:31,198 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:21:31,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2020-12-01 15:21:31,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/data/ecd0985db/8f13d1d15c96497da09dfc3e400be23b/FLAG0ae661d53 [2020-12-01 15:21:31,762 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:21:31,762 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2020-12-01 15:21:31,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/data/ecd0985db/8f13d1d15c96497da09dfc3e400be23b/FLAG0ae661d53 [2020-12-01 15:21:32,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/data/ecd0985db/8f13d1d15c96497da09dfc3e400be23b [2020-12-01 15:21:32,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:21:32,162 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-01 15:21:32,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:21:32,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:21:32,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:21:32,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a49b8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32, skipping insertion in model container [2020-12-01 15:21:32,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:21:32,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:21:32,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:21:32,389 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:21:32,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:21:32,432 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:21:32,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32 WrapperNode [2020-12-01 15:21:32,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:21:32,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:21:32,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:21:32,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:21:32,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... [2020-12-01 15:21:32,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:21:32,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:21:32,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:21:32,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:21:32,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/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 [2020-12-01 15:21:32,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-12-01 15:21:32,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:21:32,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-12-01 15:21:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-12-01 15:21:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-12-01 15:21:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-12-01 15:21:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-12-01 15:21:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:21:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:21:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:21:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:21:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-12-01 15:21:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:21:32,750 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:21:32,751 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-12-01 15:21:32,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:21:32 BoogieIcfgContainer [2020-12-01 15:21:32,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:21:32,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:21:32,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:21:32,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:21:32,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:21:32" (1/3) ... [2020-12-01 15:21:32,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223ed28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:21:32, skipping insertion in model container [2020-12-01 15:21:32,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:21:32" (2/3) ... [2020-12-01 15:21:32,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223ed28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:21:32, skipping insertion in model container [2020-12-01 15:21:32,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:21:32" (3/3) ... [2020-12-01 15:21:32,762 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2020-12-01 15:21:32,776 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:21:32,779 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-01 15:21:32,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-01 15:21:32,813 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:21:32,813 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-01 15:21:32,813 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:21:32,813 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:21:32,813 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:21:32,814 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:21:32,814 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:21:32,814 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:21:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-01 15:21:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 15:21:32,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:32,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:32,837 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash 996996062, now seen corresponding path program 1 times [2020-12-01 15:21:32,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:32,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389757050] [2020-12-01 15:21:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:33,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389757050] [2020-12-01 15:21:33,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:21:33,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:21:33,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288241883] [2020-12-01 15:21:33,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:21:33,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:21:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:21:33,049 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-12-01 15:21:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:33,124 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-01 15:21:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:21:33,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-01 15:21:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:33,133 INFO L225 Difference]: With dead ends: 28 [2020-12-01 15:21:33,134 INFO L226 Difference]: Without dead ends: 25 [2020-12-01 15:21:33,135 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 [2020-12-01 15:21:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-01 15:21:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-01 15:21:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-01 15:21:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-01 15:21:33,170 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 8 [2020-12-01 15:21:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:33,171 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-01 15:21:33,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:21:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-01 15:21:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 15:21:33,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:33,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:33,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:21:33,173 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash 996995752, now seen corresponding path program 1 times [2020-12-01 15:21:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:33,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822635676] [2020-12-01 15:21:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:33,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822635676] [2020-12-01 15:21:33,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:21:33,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:21:33,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344896731] [2020-12-01 15:21:33,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:21:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:33,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:21:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,237 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2020-12-01 15:21:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:33,347 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-01 15:21:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:21:33,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-01 15:21:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:33,351 INFO L225 Difference]: With dead ends: 31 [2020-12-01 15:21:33,351 INFO L226 Difference]: Without dead ends: 31 [2020-12-01 15:21:33,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-01 15:21:33,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-12-01 15:21:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-01 15:21:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-01 15:21:33,384 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 8 [2020-12-01 15:21:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:33,385 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-01 15:21:33,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:21:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-01 15:21:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 15:21:33,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:33,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:33,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:21:33,388 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash 996995806, now seen corresponding path program 1 times [2020-12-01 15:21:33,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:33,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715868739] [2020-12-01 15:21:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:33,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715868739] [2020-12-01 15:21:33,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:21:33,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:21:33,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144574110] [2020-12-01 15:21:33,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:21:33,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:33,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:21:33,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,536 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2020-12-01 15:21:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:33,592 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-01 15:21:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:21:33,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-01 15:21:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:33,594 INFO L225 Difference]: With dead ends: 30 [2020-12-01 15:21:33,594 INFO L226 Difference]: Without dead ends: 30 [2020-12-01 15:21:33,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-01 15:21:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-01 15:21:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 15:21:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-01 15:21:33,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2020-12-01 15:21:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:33,599 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-01 15:21:33,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:21:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-01 15:21:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 15:21:33,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:33,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:33,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:21:33,601 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash 996995805, now seen corresponding path program 1 times [2020-12-01 15:21:33,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:33,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35445490] [2020-12-01 15:21:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:33,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35445490] [2020-12-01 15:21:33,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:21:33,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:21:33,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406735878] [2020-12-01 15:21:33,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:21:33,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:21:33,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,656 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2020-12-01 15:21:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:33,722 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-01 15:21:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:21:33,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-01 15:21:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:33,724 INFO L225 Difference]: With dead ends: 25 [2020-12-01 15:21:33,725 INFO L226 Difference]: Without dead ends: 25 [2020-12-01 15:21:33,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-01 15:21:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-01 15:21:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 15:21:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-01 15:21:33,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-12-01 15:21:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:33,733 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-01 15:21:33,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:21:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-01 15:21:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:21:33,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:33,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:33,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 15:21:33,734 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:33,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:33,735 INFO L82 PathProgramCache]: Analyzing trace with hash 63449068, now seen corresponding path program 1 times [2020-12-01 15:21:33,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:33,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906252006] [2020-12-01 15:21:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:21:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906252006] [2020-12-01 15:21:33,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:21:33,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:21:33,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767415745] [2020-12-01 15:21:33,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:21:33,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:21:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,862 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2020-12-01 15:21:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:33,910 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-01 15:21:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:21:33,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-01 15:21:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:33,912 INFO L225 Difference]: With dead ends: 22 [2020-12-01 15:21:33,913 INFO L226 Difference]: Without dead ends: 22 [2020-12-01 15:21:33,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:21:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-01 15:21:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-01 15:21:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-01 15:21:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-01 15:21:33,928 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2020-12-01 15:21:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:33,929 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-01 15:21:33,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:21:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-01 15:21:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:21:33,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:33,930 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:33,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 15:21:33,930 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:33,931 INFO L82 PathProgramCache]: Analyzing trace with hash 63449121, now seen corresponding path program 1 times [2020-12-01 15:21:33,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:33,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507708755] [2020-12-01 15:21:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:34,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:34,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507708755] [2020-12-01 15:21:34,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110039492] [2020-12-01 15:21:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:21:34,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:34,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-01 15:21:34,175 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:21:34,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:21:34,183 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:21:34,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-01 15:21:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:34,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:34,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-12-01 15:21:34,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174268320] [2020-12-01 15:21:34,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:21:34,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:21:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:21:34,216 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-12-01 15:21:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:34,277 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-01 15:21:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:21:34,278 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-01 15:21:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:34,279 INFO L225 Difference]: With dead ends: 28 [2020-12-01 15:21:34,279 INFO L226 Difference]: Without dead ends: 28 [2020-12-01 15:21:34,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:21:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-01 15:21:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-01 15:21:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 15:21:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-01 15:21:34,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 12 [2020-12-01 15:21:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:34,283 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-01 15:21:34,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:21:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-01 15:21:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:21:34,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:34,285 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:34,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 15:21:34,510 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:34,510 INFO L82 PathProgramCache]: Analyzing trace with hash -564445194, now seen corresponding path program 1 times [2020-12-01 15:21:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:34,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138129169] [2020-12-01 15:21:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:34,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138129169] [2020-12-01 15:21:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598640631] [2020-12-01 15:21:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:21:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:34,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:34,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-12-01 15:21:34,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405996255] [2020-12-01 15:21:34,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:21:34,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:34,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:21:34,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:21:34,681 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-12-01 15:21:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:34,724 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-12-01 15:21:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:21:34,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-01 15:21:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:34,725 INFO L225 Difference]: With dead ends: 35 [2020-12-01 15:21:34,726 INFO L226 Difference]: Without dead ends: 35 [2020-12-01 15:21:34,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:21:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-01 15:21:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-01 15:21:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-01 15:21:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-01 15:21:34,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2020-12-01 15:21:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:34,730 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-01 15:21:34,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:21:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-01 15:21:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:21:34,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:34,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:34,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:34,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash 817658963, now seen corresponding path program 2 times [2020-12-01 15:21:34,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:34,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021236586] [2020-12-01 15:21:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021236586] [2020-12-01 15:21:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370323491] [2020-12-01 15:21:35,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:35,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-01 15:21:35,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:21:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:21:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-01 15:21:35,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:21:35,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-12-01 15:21:35,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769682858] [2020-12-01 15:21:35,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:21:35,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:35,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:21:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:21:35,197 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 5 states. [2020-12-01 15:21:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:35,235 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-01 15:21:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:21:35,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-01 15:21:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:35,239 INFO L225 Difference]: With dead ends: 34 [2020-12-01 15:21:35,239 INFO L226 Difference]: Without dead ends: 32 [2020-12-01 15:21:35,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:21:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-01 15:21:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-01 15:21:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-01 15:21:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-01 15:21:35,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-12-01 15:21:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:35,248 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-01 15:21:35,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:21:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-01 15:21:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:21:35,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:35,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:35,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:35,482 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 817651018, now seen corresponding path program 1 times [2020-12-01 15:21:35,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:35,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157302858] [2020-12-01 15:21:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:35,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157302858] [2020-12-01 15:21:35,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7960081] [2020-12-01 15:21:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:21:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:35,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:35,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-12-01 15:21:35,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635825894] [2020-12-01 15:21:35,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:21:35,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:21:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:21:35,691 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-12-01 15:21:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:35,761 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-01 15:21:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:21:35,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-01 15:21:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:35,764 INFO L225 Difference]: With dead ends: 39 [2020-12-01 15:21:35,764 INFO L226 Difference]: Without dead ends: 39 [2020-12-01 15:21:35,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:21:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-01 15:21:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-01 15:21:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-01 15:21:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-01 15:21:35,780 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2020-12-01 15:21:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:35,781 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-01 15:21:35,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:21:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-01 15:21:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 15:21:35,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:35,783 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:36,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:36,010 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1120001241, now seen corresponding path program 2 times [2020-12-01 15:21:36,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:36,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410818576] [2020-12-01 15:21:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:36,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:36,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410818576] [2020-12-01 15:21:36,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290400832] [2020-12-01 15:21:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:36,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:21:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:21:36,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:21:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:36,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:36,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-12-01 15:21:36,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405318773] [2020-12-01 15:21:36,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:21:36,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:21:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:21:36,262 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2020-12-01 15:21:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:36,322 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-01 15:21:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:21:36,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-01 15:21:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:36,324 INFO L225 Difference]: With dead ends: 43 [2020-12-01 15:21:36,324 INFO L226 Difference]: Without dead ends: 43 [2020-12-01 15:21:36,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:21:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-01 15:21:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-12-01 15:21:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-01 15:21:36,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-01 15:21:36,338 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 31 [2020-12-01 15:21:36,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:36,338 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-01 15:21:36,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:21:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-01 15:21:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-01 15:21:36,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:36,339 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:36,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-01 15:21:36,540 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash 92254852, now seen corresponding path program 3 times [2020-12-01 15:21:36,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:36,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034912460] [2020-12-01 15:21:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:36,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034912460] [2020-12-01 15:21:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86261755] [2020-12-01 15:21:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:36,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-01 15:21:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:21:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:21:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:36,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:36,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-12-01 15:21:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616397380] [2020-12-01 15:21:36,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:21:36,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:21:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:21:36,809 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2020-12-01 15:21:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:36,875 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-01 15:21:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:21:36,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-01 15:21:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:36,879 INFO L225 Difference]: With dead ends: 47 [2020-12-01 15:21:36,879 INFO L226 Difference]: Without dead ends: 47 [2020-12-01 15:21:36,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:21:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-01 15:21:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-01 15:21:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-01 15:21:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-01 15:21:36,883 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2020-12-01 15:21:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:36,883 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-01 15:21:36,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:21:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-01 15:21:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-01 15:21:36,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:36,884 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:37,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:37,107 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash 696273761, now seen corresponding path program 4 times [2020-12-01 15:21:37,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:37,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294126878] [2020-12-01 15:21:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:37,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:37,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294126878] [2020-12-01 15:21:37,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881124662] [2020-12-01 15:21:37,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:37,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:21:37,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:21:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:21:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:37,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:37,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-12-01 15:21:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549911524] [2020-12-01 15:21:37,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:21:37,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:37,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:21:37,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:21:37,358 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 12 states. [2020-12-01 15:21:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:37,421 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-01 15:21:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:21:37,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-01 15:21:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:37,422 INFO L225 Difference]: With dead ends: 51 [2020-12-01 15:21:37,422 INFO L226 Difference]: Without dead ends: 51 [2020-12-01 15:21:37,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:21:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-01 15:21:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-01 15:21:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-01 15:21:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-01 15:21:37,426 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 39 [2020-12-01 15:21:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:37,427 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-01 15:21:37,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:21:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-01 15:21:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-01 15:21:37,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:37,429 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:37,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:37,636 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1214304834, now seen corresponding path program 5 times [2020-12-01 15:21:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:37,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989639238] [2020-12-01 15:21:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:37,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989639238] [2020-12-01 15:21:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654996696] [2020-12-01 15:21:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:37,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-01 15:21:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:21:37,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:21:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:37,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:37,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-12-01 15:21:37,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254259444] [2020-12-01 15:21:37,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:21:37,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:37,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:21:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:21:37,911 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 13 states. [2020-12-01 15:21:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:37,973 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-01 15:21:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:21:37,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-12-01 15:21:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:37,975 INFO L225 Difference]: With dead ends: 55 [2020-12-01 15:21:37,975 INFO L226 Difference]: Without dead ends: 55 [2020-12-01 15:21:37,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:21:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-01 15:21:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-01 15:21:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 15:21:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-01 15:21:37,983 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2020-12-01 15:21:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:37,983 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-01 15:21:37,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:21:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-01 15:21:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-01 15:21:37,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:37,989 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:38,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 15:21:38,198 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2090572187, now seen corresponding path program 6 times [2020-12-01 15:21:38,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:38,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474103626] [2020-12-01 15:21:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:38,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:21:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:21:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:38,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474103626] [2020-12-01 15:21:38,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692648668] [2020-12-01 15:21:38,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:38,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-01 15:21:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:21:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:21:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:21:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:21:38,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:21:38,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-12-01 15:21:38,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130276943] [2020-12-01 15:21:38,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:21:38,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:21:38,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:21:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:21:38,581 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 14 states. [2020-12-01 15:21:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:21:38,663 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-01 15:21:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:21:38,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-12-01 15:21:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:21:38,665 INFO L225 Difference]: With dead ends: 56 [2020-12-01 15:21:38,665 INFO L226 Difference]: Without dead ends: 56 [2020-12-01 15:21:38,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:21:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-01 15:21:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-01 15:21:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-01 15:21:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-01 15:21:38,672 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 47 [2020-12-01 15:21:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:21:38,673 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-01 15:21:38,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:21:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-01 15:21:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-01 15:21:38,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:21:38,682 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:21:38,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:21:38,898 INFO L429 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-01 15:21:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:21:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1402261240, now seen corresponding path program 7 times [2020-12-01 15:21:38,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:21:38,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698739600] [2020-12-01 15:21:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:21:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:21:38,932 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:21:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:21:38,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:21:39,010 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:21:39,013 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:21:39,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-01 15:21:39,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:21:39 BoogieIcfgContainer [2020-12-01 15:21:39,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:21:39,075 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:21:39,075 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:21:39,076 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:21:39,076 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:21:32" (3/4) ... [2020-12-01 15:21:39,078 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:21:39,145 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5ed1a76b-60b5-446d-bf2a-d35c54f14861/bin/uautomizer/witness.graphml [2020-12-01 15:21:39,145 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:21:39,146 INFO L168 Benchmark]: Toolchain (without parser) took 6984.15 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 68.8 MB in the beginning and 89.1 MB in the end (delta: -20.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:21:39,147 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 96.5 MB. Free memory is still 54.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:21:39,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.67 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 68.8 MB in the beginning and 99.3 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:21:39,148 INFO L168 Benchmark]: Boogie Preprocessor took 35.03 ms. Allocated memory is still 121.6 MB. Free memory was 98.8 MB in the beginning and 97.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:21:39,148 INFO L168 Benchmark]: RCFGBuilder took 282.11 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 85.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:21:39,148 INFO L168 Benchmark]: TraceAbstraction took 6315.82 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 84.6 MB in the beginning and 92.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:21:39,149 INFO L168 Benchmark]: Witness Printer took 69.98 ms. Allocated memory is still 146.8 MB. Free memory was 92.2 MB in the beginning and 89.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:21:39,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 96.5 MB. Free memory is still 54.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.67 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 68.8 MB in the beginning and 99.3 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.03 ms. Allocated memory is still 121.6 MB. Free memory was 98.8 MB in the beginning and 97.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 282.11 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 85.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6315.82 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 84.6 MB in the beginning and 92.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * Witness Printer took 69.98 ms. Allocated memory is still 146.8 MB. Free memory was 92.2 MB in the beginning and 89.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; VAL [alloca(10 * sizeof(char))={11:0}, i=0, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-1, alloca(10 * sizeof(char))={11:0}, i=0, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=1, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, alloca(10 * sizeof(char))={11:0}, i=1, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=2, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=97, alloca(10 * sizeof(char))={11:0}, i=2, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=3, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, alloca(10 * sizeof(char))={11:0}, i=3, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=4, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, alloca(10 * sizeof(char))={11:0}, i=4, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=5, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, alloca(10 * sizeof(char))={11:0}, i=5, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=6, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, alloca(10 * sizeof(char))={11:0}, i=6, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=7, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, alloca(10 * sizeof(char))={11:0}, i=7, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=8, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, alloca(10 * sizeof(char))={11:0}, i=8, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=9, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-10, alloca(10 * sizeof(char))={11:0}, i=9, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L9] COND FALSE !(i < 10) VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L13] EXPR p[2] VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}, p[2]=97] [L13] COND TRUE p[2] == 'a' [L14] free(p) VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L14] free(p) VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 15, TraceHistogramMax: 10, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 215 SDtfs, 205 SDslu, 505 SDs, 0 SdLazy, 592 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 27 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 663 NumberOfCodeBlocks, 639 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 589 ConstructedInterpolants, 1 QuantifiedInterpolants, 56614 SizeOfPredicates, 3 NumberOfNonLiveVariables, 928 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 29/1097 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 incorrect! Received shutdown request...