./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 56b28f59847d63942ec468b0c95f39e5b8c0763a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:57:49,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:57:49,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:57:50,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:57:50,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:57:50,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:57:50,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:57:50,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:57:50,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:57:50,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:57:50,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:57:50,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:57:50,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:57:50,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:57:50,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:57:50,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:57:50,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:57:50,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:57:50,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:57:50,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:57:50,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:57:50,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:57:50,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:57:50,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:57:50,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:57:50,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:57:50,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:57:50,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:57:50,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:57:50,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:57:50,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:57:50,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:57:50,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:57:50,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:57:50,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:57:50,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:57:50,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:57:50,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:57:50,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:57:50,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:57:50,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:57:50,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 02:57:50,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:57:50,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:57:50,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:57:50,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:57:50,121 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:57:50,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:57:50,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:57:50,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:57:50,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:57:50,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:57:50,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:57:50,124 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 02:57:50,124 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 02:57:50,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 02:57:50,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:57:50,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 02:57:50,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:57:50,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:57:50,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:57:50,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:57:50,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:57:50,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:57:50,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:50,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:57:50,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:57:50,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:57:50,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:57:50,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:57:50,128 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_2dd59649-faf7-4b36-b32c-ac355724d115/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2020-11-28 02:57:50,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:57:50,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:57:50,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:57:50,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:57:50,491 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:57:50,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-11-28 02:57:50,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/data/437367ab9/da8935f7c7524e83b210e1d1180f9d4b/FLAGfeea3f242 [2020-11-28 02:57:50,996 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:57:50,996 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-11-28 02:57:51,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/data/437367ab9/da8935f7c7524e83b210e1d1180f9d4b/FLAGfeea3f242 [2020-11-28 02:57:51,402 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/data/437367ab9/da8935f7c7524e83b210e1d1180f9d4b [2020-11-28 02:57:51,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:57:51,406 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 02:57:51,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:51,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:57:51,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:57:51,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b4206a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51, skipping insertion in model container [2020-11-28 02:57:51,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:57:51,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:57:51,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:51,645 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:57:51,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:51,673 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:57:51,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51 WrapperNode [2020-11-28 02:57:51,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:51,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:57:51,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:57:51,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:57:51,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:57:51,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:57:51,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:57:51,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:57:51,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:51,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 02:57:51,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:57:51,788 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-28 02:57:51,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 02:57:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-28 02:57:51,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:57:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 02:57:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:57:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:57:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:57:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 02:57:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:57:52,095 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:57:52,096 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-28 02:57:52,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:52 BoogieIcfgContainer [2020-11-28 02:57:52,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:57:52,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:57:52,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:57:52,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:57:52,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:57:51" (1/3) ... [2020-11-28 02:57:52,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d822421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:52, skipping insertion in model container [2020-11-28 02:57:52,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (2/3) ... [2020-11-28 02:57:52,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d822421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:52, skipping insertion in model container [2020-11-28 02:57:52,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:52" (3/3) ... [2020-11-28 02:57:52,120 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2020-11-28 02:57:52,131 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:57:52,148 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 02:57:52,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 02:57:52,199 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:57:52,204 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 02:57:52,204 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:57:52,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:57:52,204 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:57:52,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:57:52,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:57:52,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:57:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-28 02:57:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:57:52,226 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:52,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:52,227 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:52,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-11-28 02:57:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:52,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004257847] [2020-11-28 02:57:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:52,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:52,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004257847] [2020-11-28 02:57:52,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:52,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649509392] [2020-11-28 02:57:52,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:52,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:52,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:52,448 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-28 02:57:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:52,725 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-28 02:57:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:52,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 02:57:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:52,748 INFO L225 Difference]: With dead ends: 58 [2020-11-28 02:57:52,748 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 02:57:52,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 02:57:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-28 02:57:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 02:57:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-28 02:57:52,788 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-11-28 02:57:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:52,789 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-28 02:57:52,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-28 02:57:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:57:52,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:52,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:52,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:57:52,791 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-11-28 02:57:52,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:52,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826374621] [2020-11-28 02:57:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,015 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-11-28 02:57:53,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826374621] [2020-11-28 02:57:53,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:53,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610597165] [2020-11-28 02:57:53,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:53,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:53,035 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-28 02:57:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:53,178 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-11-28 02:57:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:53,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 02:57:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:53,181 INFO L225 Difference]: With dead ends: 49 [2020-11-28 02:57:53,181 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 02:57:53,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 02:57:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-28 02:57:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 02:57:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-28 02:57:53,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-11-28 02:57:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:53,190 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-28 02:57:53,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-28 02:57:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:57:53,191 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:53,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:53,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:57:53,192 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-11-28 02:57:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:53,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169611218] [2020-11-28 02:57:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169611218] [2020-11-28 02:57:53,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227499971] [2020-11-28 02:57:53,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:53,283 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-11-28 02:57:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:53,439 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-28 02:57:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:53,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 02:57:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:53,440 INFO L225 Difference]: With dead ends: 40 [2020-11-28 02:57:53,441 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 02:57:53,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:57:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 02:57:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 02:57:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 02:57:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-28 02:57:53,446 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-11-28 02:57:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:53,447 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-28 02:57:53,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-28 02:57:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:57:53,448 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:53,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:53,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:57:53,448 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-11-28 02:57:53,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:53,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248295079] [2020-11-28 02:57:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248295079] [2020-11-28 02:57:53,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:53,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447042764] [2020-11-28 02:57:53,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:53,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:53,587 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-11-28 02:57:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:53,776 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-11-28 02:57:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:53,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 02:57:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:53,778 INFO L225 Difference]: With dead ends: 46 [2020-11-28 02:57:53,778 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 02:57:53,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:57:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 02:57:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-11-28 02:57:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 02:57:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-28 02:57:53,785 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-11-28 02:57:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:53,786 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-28 02:57:53,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-28 02:57:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:57:53,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:53,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:53,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:57:53,788 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:53,788 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-11-28 02:57:53,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:53,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150499549] [2020-11-28 02:57:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150499549] [2020-11-28 02:57:53,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 02:57:53,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116150149] [2020-11-28 02:57:53,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:53,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:53,902 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-11-28 02:57:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,149 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-11-28 02:57:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:54,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-28 02:57:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,153 INFO L225 Difference]: With dead ends: 61 [2020-11-28 02:57:54,153 INFO L226 Difference]: Without dead ends: 61 [2020-11-28 02:57:54,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:57:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-28 02:57:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-11-28 02:57:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 02:57:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-28 02:57:54,169 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 15 [2020-11-28 02:57:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,170 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-28 02:57:54,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-28 02:57:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:57:54,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,171 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:57:54,173 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-11-28 02:57:54,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036315728] [2020-11-28 02:57:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:54,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036315728] [2020-11-28 02:57:54,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234639086] [2020-11-28 02:57:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:57:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:54,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:57:54,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-11-28 02:57:54,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971510413] [2020-11-28 02:57:54,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:54,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:54,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:57:54,613 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 6 states. [2020-11-28 02:57:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,769 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-11-28 02:57:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:54,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 02:57:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,771 INFO L225 Difference]: With dead ends: 72 [2020-11-28 02:57:54,771 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 02:57:54,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:57:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 02:57:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-11-28 02:57:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 02:57:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-28 02:57:54,778 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-11-28 02:57:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,779 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-28 02:57:54,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-28 02:57:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:57:54,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 02:57:54,981 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-11-28 02:57:54,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989800299] [2020-11-28 02:57:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989800299] [2020-11-28 02:57:55,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:55,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791393795] [2020-11-28 02:57:55,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:55,072 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-11-28 02:57:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:55,184 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-28 02:57:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:55,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 02:57:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:55,185 INFO L225 Difference]: With dead ends: 50 [2020-11-28 02:57:55,185 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 02:57:55,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 02:57:55,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-28 02:57:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-28 02:57:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-28 02:57:55,191 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 20 [2020-11-28 02:57:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:55,191 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-28 02:57:55,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-28 02:57:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:57:55,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:55,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:55,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 02:57:55,195 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234190, now seen corresponding path program 1 times [2020-11-28 02:57:55,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:55,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356188542] [2020-11-28 02:57:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:55,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356188542] [2020-11-28 02:57:55,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:55,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694204114] [2020-11-28 02:57:55,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:55,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:55,325 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-11-28 02:57:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:55,449 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-11-28 02:57:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:55,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 02:57:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:55,450 INFO L225 Difference]: With dead ends: 54 [2020-11-28 02:57:55,450 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 02:57:55,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 02:57:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-11-28 02:57:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 02:57:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-28 02:57:55,455 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 20 [2020-11-28 02:57:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:55,456 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-28 02:57:55,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-28 02:57:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 02:57:55,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:55,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:55,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 02:57:55,462 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2011781567, now seen corresponding path program 1 times [2020-11-28 02:57:55,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:55,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520667675] [2020-11-28 02:57:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:55,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520667675] [2020-11-28 02:57:55,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481436021] [2020-11-28 02:57:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:57:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:55,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:55,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 02:57:55,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633909024] [2020-11-28 02:57:55,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:55,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:55,652 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 6 states. [2020-11-28 02:57:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:55,792 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-11-28 02:57:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:55,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-28 02:57:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:55,793 INFO L225 Difference]: With dead ends: 76 [2020-11-28 02:57:55,794 INFO L226 Difference]: Without dead ends: 76 [2020-11-28 02:57:55,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-28 02:57:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-11-28 02:57:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 02:57:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-11-28 02:57:55,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 26 [2020-11-28 02:57:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:55,800 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-11-28 02:57:55,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-11-28 02:57:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 02:57:55,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:55,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:56,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:56,029 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1143280978, now seen corresponding path program 1 times [2020-11-28 02:57:56,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:56,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351078347] [2020-11-28 02:57:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:57:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:57:56,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351078347] [2020-11-28 02:57:56,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775366045] [2020-11-28 02:57:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:57:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:57:56,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:57:56,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-11-28 02:57:56,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86164457] [2020-11-28 02:57:56,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:56,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:57:56,270 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 6 states. [2020-11-28 02:57:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:56,408 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-11-28 02:57:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:56,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-11-28 02:57:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:56,410 INFO L225 Difference]: With dead ends: 68 [2020-11-28 02:57:56,410 INFO L226 Difference]: Without dead ends: 65 [2020-11-28 02:57:56,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:57:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-28 02:57:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-11-28 02:57:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 02:57:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-11-28 02:57:56,416 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2020-11-28 02:57:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:56,416 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-11-28 02:57:56,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-11-28 02:57:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 02:57:56,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:56,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:56,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 02:57:56,637 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1735380924, now seen corresponding path program 1 times [2020-11-28 02:57:56,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:56,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592088164] [2020-11-28 02:57:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:57:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592088164] [2020-11-28 02:57:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75368719] [2020-11-28 02:57:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:57:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:57:56,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:56,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-11-28 02:57:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440528717] [2020-11-28 02:57:56,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:56,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:56,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:56,803 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 5 states. [2020-11-28 02:57:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:56,926 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-11-28 02:57:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:56,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-11-28 02:57:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:56,927 INFO L225 Difference]: With dead ends: 70 [2020-11-28 02:57:56,927 INFO L226 Difference]: Without dead ends: 70 [2020-11-28 02:57:56,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:57:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-28 02:57:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-11-28 02:57:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 02:57:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-11-28 02:57:56,942 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 32 [2020-11-28 02:57:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:56,944 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-11-28 02:57:56,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:56,945 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-11-28 02:57:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 02:57:56,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:56,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:57,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:57,157 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2037766250, now seen corresponding path program 1 times [2020-11-28 02:57:57,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:57,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924549526] [2020-11-28 02:57:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:57:57,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924549526] [2020-11-28 02:57:57,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:57,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 02:57:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106969528] [2020-11-28 02:57:57,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:57:57,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:57:57,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:57:57,302 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 7 states. [2020-11-28 02:57:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:57,441 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-11-28 02:57:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:57:57,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-11-28 02:57:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:57,442 INFO L225 Difference]: With dead ends: 62 [2020-11-28 02:57:57,443 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 02:57:57,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:57:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 02:57:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-28 02:57:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 02:57:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-11-28 02:57:57,448 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2020-11-28 02:57:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:57,448 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-11-28 02:57:57,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:57:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-11-28 02:57:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 02:57:57,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:57,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:57,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 02:57:57,450 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1978883467, now seen corresponding path program 2 times [2020-11-28 02:57:57,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:57,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950529492] [2020-11-28 02:57:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:57:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:57:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950529492] [2020-11-28 02:57:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343336876] [2020-11-28 02:57:57,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:57,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:57:57,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:57:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:57:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:57:57,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:57,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-28 02:57:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402176873] [2020-11-28 02:57:57,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:57:57,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:57:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:57:57,724 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-11-28 02:57:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:58,024 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-11-28 02:57:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:57:58,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-28 02:57:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:58,025 INFO L225 Difference]: With dead ends: 72 [2020-11-28 02:57:58,025 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 02:57:58,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-28 02:57:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 02:57:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-11-28 02:57:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 02:57:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-11-28 02:57:58,039 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2020-11-28 02:57:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:58,039 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-11-28 02:57:58,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:57:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-11-28 02:57:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 02:57:58,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:58,041 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:58,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 02:57:58,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1601507541, now seen corresponding path program 2 times [2020-11-28 02:57:58,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:58,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432242339] [2020-11-28 02:57:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:58,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:58,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:58,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432242339] [2020-11-28 02:57:58,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497609510] [2020-11-28 02:57:58,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:58,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:57:58,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:57:58,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:57:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:58,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:58,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-11-28 02:57:58,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255912816] [2020-11-28 02:57:58,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 02:57:58,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:58,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 02:57:58,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:57:58,504 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 13 states. [2020-11-28 02:57:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:58,853 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-11-28 02:57:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:57:58,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-28 02:57:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:58,855 INFO L225 Difference]: With dead ends: 94 [2020-11-28 02:57:58,855 INFO L226 Difference]: Without dead ends: 94 [2020-11-28 02:57:58,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-11-28 02:57:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-28 02:57:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-11-28 02:57:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-28 02:57:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-28 02:57:58,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 37 [2020-11-28 02:57:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:58,861 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-28 02:57:58,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 02:57:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-28 02:57:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-28 02:57:58,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:58,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:59,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:59,063 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:57:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1930842354, now seen corresponding path program 3 times [2020-11-28 02:57:59,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:59,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001869892] [2020-11-28 02:57:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:57:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:57:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 02:57:59,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001869892] [2020-11-28 02:57:59,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965529832] [2020-11-28 02:57:59,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:57:59,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 02:57:59,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:57:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 02:57:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:59,309 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2020-11-28 02:57:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:57:59,326 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 02:57:59,326 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:57:59,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:57:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:57:59,346 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-11-28 02:57:59,357 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 02:57:59,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:57:59,378 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 02:57:59,379 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-11-28 02:57:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 02:57:59,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:59,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-11-28 02:57:59,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671835138] [2020-11-28 02:57:59,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:57:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:57:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:57:59,622 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 9 states. [2020-11-28 02:57:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:59,806 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-11-28 02:57:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:57:59,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-11-28 02:57:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:59,808 INFO L225 Difference]: With dead ends: 82 [2020-11-28 02:57:59,808 INFO L226 Difference]: Without dead ends: 82 [2020-11-28 02:57:59,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:57:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-28 02:57:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-11-28 02:57:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 02:57:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-11-28 02:57:59,812 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 41 [2020-11-28 02:57:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:59,813 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-11-28 02:57:59,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:57:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-11-28 02:57:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-28 02:57:59,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:59,815 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:00,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 02:58:00,025 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash 492189859, now seen corresponding path program 2 times [2020-11-28 02:58:00,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:00,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144198385] [2020-11-28 02:58:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 02:58:00,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144198385] [2020-11-28 02:58:00,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961304675] [2020-11-28 02:58:00,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:58:00,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 02:58:00,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:00,189 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_25|]} [2020-11-28 02:58:00,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:00,199 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 02:58:00,200 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:00,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:00,222 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-11-28 02:58:00,223 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:00,231 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:00,232 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:00,232 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-28 02:58:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-28 02:58:00,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:00,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-11-28 02:58:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014493054] [2020-11-28 02:58:00,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:00,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:00,418 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-11-28 02:58:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:00,503 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-11-28 02:58:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:00,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-28 02:58:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:00,505 INFO L225 Difference]: With dead ends: 81 [2020-11-28 02:58:00,505 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 02:58:00,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 02:58:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-11-28 02:58:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 02:58:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-11-28 02:58:00,509 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 47 [2020-11-28 02:58:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:00,509 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-11-28 02:58:00,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-11-28 02:58:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-28 02:58:00,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:00,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:00,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 02:58:00,729 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash -190258011, now seen corresponding path program 1 times [2020-11-28 02:58:00,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:00,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205039181] [2020-11-28 02:58:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 02:58:00,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205039181] [2020-11-28 02:58:00,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259752709] [2020-11-28 02:58:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/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 [2020-11-28 02:58:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 02:58:00,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:00,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-28 02:58:00,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497905968] [2020-11-28 02:58:00,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:58:00,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:00,910 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 7 states. [2020-11-28 02:58:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:01,066 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-11-28 02:58:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:01,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-11-28 02:58:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:01,068 INFO L225 Difference]: With dead ends: 107 [2020-11-28 02:58:01,068 INFO L226 Difference]: Without dead ends: 107 [2020-11-28 02:58:01,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-28 02:58:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-11-28 02:58:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 02:58:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-11-28 02:58:01,072 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 50 [2020-11-28 02:58:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:01,074 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-11-28 02:58:01,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:58:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-11-28 02:58:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-28 02:58:01,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:01,079 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:01,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 02:58:01,289 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2025940537, now seen corresponding path program 3 times [2020-11-28 02:58:01,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:01,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885341995] [2020-11-28 02:58:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:01,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:01,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-28 02:58:01,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885341995] [2020-11-28 02:58:01,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912149990] [2020-11-28 02:58:01,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:01,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 02:58:01,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 02:58:01,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:01,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2020-11-28 02:58:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481510630] [2020-11-28 02:58:01,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:58:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:58:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:01,551 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 12 states. [2020-11-28 02:58:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:01,934 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-11-28 02:58:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:58:01,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-11-28 02:58:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:01,935 INFO L225 Difference]: With dead ends: 103 [2020-11-28 02:58:01,936 INFO L226 Difference]: Without dead ends: 103 [2020-11-28 02:58:01,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-28 02:58:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-28 02:58:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-11-28 02:58:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-28 02:58:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-11-28 02:58:01,940 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 58 [2020-11-28 02:58:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:01,941 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-11-28 02:58:01,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:58:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-11-28 02:58:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-28 02:58:01,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:01,942 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:02,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 02:58:02,143 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash 746278286, now seen corresponding path program 4 times [2020-11-28 02:58:02,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:02,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110103036] [2020-11-28 02:58:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 02:58:02,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110103036] [2020-11-28 02:58:02,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699470044] [2020-11-28 02:58:02,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:02,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:58:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 02:58:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 02:58:02,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:02,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2020-11-28 02:58:02,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502289443] [2020-11-28 02:58:02,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 02:58:02,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 02:58:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-28 02:58:02,497 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 16 states. [2020-11-28 02:58:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:03,215 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-11-28 02:58:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 02:58:03,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-11-28 02:58:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:03,216 INFO L225 Difference]: With dead ends: 104 [2020-11-28 02:58:03,216 INFO L226 Difference]: Without dead ends: 101 [2020-11-28 02:58:03,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-11-28 02:58:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-28 02:58:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-11-28 02:58:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-28 02:58:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-11-28 02:58:03,221 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 62 [2020-11-28 02:58:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:03,221 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-11-28 02:58:03,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 02:58:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-11-28 02:58:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-28 02:58:03,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:03,222 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:03,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:03,423 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1227025103, now seen corresponding path program 5 times [2020-11-28 02:58:03,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:03,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142825141] [2020-11-28 02:58:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-28 02:58:03,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142825141] [2020-11-28 02:58:03,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802278994] [2020-11-28 02:58:03,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:03,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-28 02:58:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:03,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:58:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:03,690 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_26|]} [2020-11-28 02:58:03,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:03,696 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 02:58:03,697 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:03,708 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:03,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:03,714 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-11-28 02:58:03,716 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:03,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:03,726 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:03,727 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-11-28 02:58:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-28 02:58:04,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:04,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-28 02:58:04,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659308261] [2020-11-28 02:58:04,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:58:04,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:58:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:04,015 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 10 states. [2020-11-28 02:58:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:04,221 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-11-28 02:58:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:04,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-11-28 02:58:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:04,223 INFO L225 Difference]: With dead ends: 95 [2020-11-28 02:58:04,223 INFO L226 Difference]: Without dead ends: 95 [2020-11-28 02:58:04,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:58:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-28 02:58:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-11-28 02:58:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-28 02:58:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-11-28 02:58:04,228 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 67 [2020-11-28 02:58:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:04,228 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-11-28 02:58:04,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:58:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-11-28 02:58:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 02:58:04,229 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:04,229 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:04,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:04,449 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -199290008, now seen corresponding path program 2 times [2020-11-28 02:58:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:04,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962589498] [2020-11-28 02:58:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:04,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:04,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:04,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-28 02:58:04,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962589498] [2020-11-28 02:58:04,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732558001] [2020-11-28 02:58:04,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:04,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 02:58:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:58:04,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:04,654 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 02:58:04,654 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 02:58:04,656 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:04,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:04,665 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:04,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 02:58:04,785 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 02:58:04,785 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 02:58:04,786 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:04,793 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:04,795 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:04,795 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 02:58:04,896 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 02:58:04,896 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 02:58:04,897 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:04,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:04,916 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:04,916 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 02:58:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-11-28 02:58:05,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:05,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-11-28 02:58:05,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211292987] [2020-11-28 02:58:05,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:58:05,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:05,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:58:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:58:05,084 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 6 states. [2020-11-28 02:58:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:05,171 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-11-28 02:58:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:05,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-11-28 02:58:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:05,173 INFO L225 Difference]: With dead ends: 92 [2020-11-28 02:58:05,173 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 02:58:05,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 02:58:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-11-28 02:58:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-28 02:58:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-11-28 02:58:05,176 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2020-11-28 02:58:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:05,177 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-11-28 02:58:05,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:58:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-11-28 02:58:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 02:58:05,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:05,178 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:05,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 02:58:05,387 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1882931165, now seen corresponding path program 1 times [2020-11-28 02:58:05,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:05,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358286002] [2020-11-28 02:58:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-28 02:58:05,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358286002] [2020-11-28 02:58:05,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088605772] [2020-11-28 02:58:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-28 02:58:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:05,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-28 02:58:05,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282540972] [2020-11-28 02:58:05,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:05,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:05,589 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 8 states. [2020-11-28 02:58:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:05,747 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-11-28 02:58:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:05,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-11-28 02:58:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:05,749 INFO L225 Difference]: With dead ends: 108 [2020-11-28 02:58:05,749 INFO L226 Difference]: Without dead ends: 108 [2020-11-28 02:58:05,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-28 02:58:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2020-11-28 02:58:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-28 02:58:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-11-28 02:58:05,753 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-11-28 02:58:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:05,754 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-11-28 02:58:05,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-11-28 02:58:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-28 02:58:05,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:05,755 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:05,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:05,955 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:05,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1445837420, now seen corresponding path program 6 times [2020-11-28 02:58:05,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:05,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804150387] [2020-11-28 02:58:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-28 02:58:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-11-28 02:58:06,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804150387] [2020-11-28 02:58:06,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721831763] [2020-11-28 02:58:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:06,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-28 02:58:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 02:58:06,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:06,238 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_29|]} [2020-11-28 02:58:06,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:06,243 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 02:58:06,244 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:06,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:06,262 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-11-28 02:58:06,265 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:06,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:06,272 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:06,272 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-28 02:58:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 83 proven. 67 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-28 02:58:06,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:06,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2020-11-28 02:58:06,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309601499] [2020-11-28 02:58:06,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-28 02:58:06,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:06,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-28 02:58:06,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-28 02:58:06,848 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 20 states. [2020-11-28 02:58:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:08,030 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-11-28 02:58:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 02:58:08,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-11-28 02:58:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:08,031 INFO L225 Difference]: With dead ends: 106 [2020-11-28 02:58:08,032 INFO L226 Difference]: Without dead ends: 96 [2020-11-28 02:58:08,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2020-11-28 02:58:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-28 02:58:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-11-28 02:58:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-28 02:58:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-11-28 02:58:08,036 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 93 [2020-11-28 02:58:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:08,036 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-11-28 02:58:08,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-28 02:58:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-11-28 02:58:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-28 02:58:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:08,038 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:08,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-28 02:58:08,257 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1309983867, now seen corresponding path program 2 times [2020-11-28 02:58:08,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:08,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568152702] [2020-11-28 02:58:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-28 02:58:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-28 02:58:08,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568152702] [2020-11-28 02:58:08,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574769502] [2020-11-28 02:58:08,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:08,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:08,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:08,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:58:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-28 02:58:08,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:08,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-28 02:58:08,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918031874] [2020-11-28 02:58:08,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:58:08,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:58:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:08,522 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 9 states. [2020-11-28 02:58:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:08,633 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-11-28 02:58:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:08,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-11-28 02:58:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:08,634 INFO L225 Difference]: With dead ends: 103 [2020-11-28 02:58:08,635 INFO L226 Difference]: Without dead ends: 103 [2020-11-28 02:58:08,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-28 02:58:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-28 02:58:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-28 02:58:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-11-28 02:58:08,639 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 108 [2020-11-28 02:58:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:08,639 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-11-28 02:58:08,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:58:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-11-28 02:58:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-28 02:58:08,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:08,645 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:08,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:08,865 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:58:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash 472765411, now seen corresponding path program 3 times [2020-11-28 02:58:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306707585] [2020-11-28 02:58:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:58:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-28 02:58:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-28 02:58:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:09,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-28 02:58:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-11-28 02:58:09,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306707585] [2020-11-28 02:58:09,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268665030] [2020-11-28 02:58:09,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:09,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 02:58:09,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:58:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:09,112 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_30|]} [2020-11-28 02:58:09,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:09,118 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 02:58:09,118 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:09,127 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 02:58:09,146 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-11-28 02:58:09,147 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:09,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:09,154 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:09,154 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-28 02:58:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-11-28 02:58:09,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:09,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2020-11-28 02:58:09,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96182143] [2020-11-28 02:58:09,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:58:09,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:09,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:09,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:58:09,610 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 7 states. [2020-11-28 02:58:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:09,658 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-11-28 02:58:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:09,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-11-28 02:58:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:09,659 INFO L225 Difference]: With dead ends: 97 [2020-11-28 02:58:09,659 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 02:58:09,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:58:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 02:58:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 02:58:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 02:58:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 02:58:09,660 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-11-28 02:58:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:09,660 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:09,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:58:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 02:58:09,660 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 02:58:09,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-28 02:58:09,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:09 BoogieIcfgContainer [2020-11-28 02:58:09,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:09,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:09,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:09,877 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:09,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:52" (3/4) ... [2020-11-28 02:58:09,879 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 02:58:09,883 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 02:58:09,883 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-28 02:58:09,883 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 02:58:09,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-28 02:58:09,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 02:58:09,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 02:58:09,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 02:58:09,916 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2dd59649-faf7-4b36-b32c-ac355724d115/bin/uautomizer/witness.graphml [2020-11-28 02:58:09,916 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:09,917 INFO L168 Benchmark]: Toolchain (without parser) took 18511.02 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 71.7 MB in the beginning and 47.0 MB in the end (delta: 24.8 MB). Peak memory consumption was 76.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,917 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 109.1 MB. Free memory is still 88.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:09,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.18 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 85.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,918 INFO L168 Benchmark]: Boogie Preprocessor took 32.96 ms. Allocated memory is still 109.1 MB. Free memory was 85.2 MB in the beginning and 84.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:09,919 INFO L168 Benchmark]: RCFGBuilder took 389.11 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 68.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,919 INFO L168 Benchmark]: TraceAbstraction took 17776.85 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 68.1 MB in the beginning and 49.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 72.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,920 INFO L168 Benchmark]: Witness Printer took 39.92 ms. Allocated memory is still 161.5 MB. Free memory was 49.7 MB in the beginning and 47.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 109.1 MB. Free memory is still 88.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.18 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 85.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.96 ms. Allocated memory is still 109.1 MB. Free memory was 85.2 MB in the beginning and 84.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 389.11 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 68.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17776.85 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 68.1 MB in the beginning and 49.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 72.5 MB. Max. memory is 16.1 GB. * Witness Printer took 39.92 ms. Allocated memory is still 161.5 MB. Free memory was 49.7 MB in the beginning and 47.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.6s, OverallIterations: 25, TraceHistogramMax: 14, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 601 SDtfs, 1341 SDslu, 1101 SDs, 0 SdLazy, 3273 SolverSat, 281 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1304 GetRequests, 1040 SyntacticMatches, 34 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=24, 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, 25 MinimizatonAttempts, 209 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 2125 NumberOfCodeBlocks, 1811 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2083 ConstructedInterpolants, 395 QuantifiedInterpolants, 800524 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2311 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 42 InterpolantComputations, 13 PerfectInterpolantSequences, 3552/4007 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...