./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 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 0.2.0-69874e2 [2020-12-01 14:57:28,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 14:57:28,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 14:57:28,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 14:57:28,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 14:57:28,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 14:57:28,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 14:57:28,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 14:57:28,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 14:57:28,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 14:57:28,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 14:57:28,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 14:57:28,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 14:57:28,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 14:57:28,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 14:57:28,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 14:57:28,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 14:57:28,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 14:57:28,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 14:57:28,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 14:57:28,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 14:57:28,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 14:57:28,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 14:57:28,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 14:57:28,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 14:57:28,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 14:57:28,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 14:57:28,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 14:57:28,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 14:57:28,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 14:57:28,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 14:57:28,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 14:57:28,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 14:57:28,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 14:57:28,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 14:57:28,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 14:57:28,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 14:57:28,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 14:57:28,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 14:57:28,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 14:57:28,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 14:57:28,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-12-01 14:57:28,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 14:57:28,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 14:57:28,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 14:57:28,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 14:57:28,729 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 14:57:28,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 14:57:28,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 14:57:28,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 14:57:28,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 14:57:28,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 14:57:28,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 14:57:28,733 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-01 14:57:28,733 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-01 14:57:28,733 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-01 14:57:28,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 14:57:28,734 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-01 14:57:28,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 14:57:28,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 14:57:28,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 14:57:28,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 14:57:28,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 14:57:28,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 14:57:28,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:57:28,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 14:57:28,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 14:57:28,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 14:57:28,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 14:57:28,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 14:57:28,743 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_29681c69-d6d4-4537-bfdc-edeee7869f47/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2020-12-01 14:57:29,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 14:57:29,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 14:57:29,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 14:57:29,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 14:57:29,144 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 14:57:29,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-12-01 14:57:29,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/data/442809d35/c0931b970037411781abe909dee63900/FLAGba0f42ba9 [2020-12-01 14:57:29,717 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 14:57:29,717 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-12-01 14:57:29,726 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/data/442809d35/c0931b970037411781abe909dee63900/FLAGba0f42ba9 [2020-12-01 14:57:30,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/data/442809d35/c0931b970037411781abe909dee63900 [2020-12-01 14:57:30,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 14:57:30,103 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-01 14:57:30,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 14:57:30,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 14:57:30,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 14:57:30,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5f90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30, skipping insertion in model container [2020-12-01 14:57:30,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 14:57:30,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 14:57:30,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:57:30,352 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 14:57:30,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:57:30,398 INFO L208 MainTranslator]: Completed translation [2020-12-01 14:57:30,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30 WrapperNode [2020-12-01 14:57:30,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 14:57:30,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 14:57:30,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 14:57:30,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 14:57:30,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... [2020-12-01 14:57:30,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 14:57:30,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 14:57:30,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 14:57:30,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 14:57:30,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:57:30,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-12-01 14:57:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 14:57:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-12-01 14:57:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-12-01 14:57:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-12-01 14:57:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 14:57:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-12-01 14:57:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 14:57:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 14:57:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 14:57:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-12-01 14:57:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 14:57:30,947 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 14:57:30,947 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-12-01 14:57:30,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:30 BoogieIcfgContainer [2020-12-01 14:57:30,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 14:57:30,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 14:57:30,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 14:57:30,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 14:57:30,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 02:57:30" (1/3) ... [2020-12-01 14:57:30,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef6aba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:57:30, skipping insertion in model container [2020-12-01 14:57:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:30" (2/3) ... [2020-12-01 14:57:30,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef6aba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:57:30, skipping insertion in model container [2020-12-01 14:57:30,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:30" (3/3) ... [2020-12-01 14:57:30,975 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2020-12-01 14:57:30,993 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 14:57:30,996 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-01 14:57:31,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-01 14:57:31,043 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 14:57:31,043 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-01 14:57:31,043 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 14:57:31,044 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 14:57:31,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 14:57:31,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 14:57:31,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 14:57:31,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 14:57:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-01 14:57:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 14:57:31,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:31,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:31,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-12-01 14:57:31,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:31,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031453173] [2020-12-01 14:57:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:31,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:31,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031453173] [2020-12-01 14:57:31,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:31,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535725049] [2020-12-01 14:57:31,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:31,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:31,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:31,294 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-12-01 14:57:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:31,498 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-01 14:57:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 14:57:31,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-01 14:57:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:31,516 INFO L225 Difference]: With dead ends: 58 [2020-12-01 14:57:31,522 INFO L226 Difference]: Without dead ends: 54 [2020-12-01 14:57:31,524 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 [2020-12-01 14:57:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-01 14:57:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-12-01 14:57:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-01 14:57:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-01 14:57:31,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-12-01 14:57:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:31,563 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-01 14:57:31,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-01 14:57:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 14:57:31,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:31,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:31,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 14:57:31,564 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-12-01 14:57:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:31,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840186491] [2020-12-01 14:57:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:31,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:31,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840186491] [2020-12-01 14:57:31,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:31,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 14:57:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234728797] [2020-12-01 14:57:31,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:31,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:31,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:31,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:31,646 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-12-01 14:57:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:31,751 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-01 14:57:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:31,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-01 14:57:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:31,755 INFO L225 Difference]: With dead ends: 49 [2020-12-01 14:57:31,755 INFO L226 Difference]: Without dead ends: 49 [2020-12-01 14:57:31,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:57:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-01 14:57:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-12-01 14:57:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-01 14:57:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-01 14:57:31,764 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-12-01 14:57:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:31,764 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-01 14:57:31,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-01 14:57:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 14:57:31,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:31,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:31,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 14:57:31,766 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-12-01 14:57:31,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:31,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253730126] [2020-12-01 14:57:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253730126] [2020-12-01 14:57:31,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:31,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 14:57:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633845366] [2020-12-01 14:57:31,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-01 14:57:31,869 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-12-01 14:57:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:32,048 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-01 14:57:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:32,048 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-01 14:57:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:32,058 INFO L225 Difference]: With dead ends: 40 [2020-12-01 14:57:32,058 INFO L226 Difference]: Without dead ends: 40 [2020-12-01 14:57:32,060 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 [2020-12-01 14:57:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-01 14:57:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-01 14:57:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-01 14:57:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-01 14:57:32,082 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-12-01 14:57:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:32,083 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-01 14:57:32,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-01 14:57:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 14:57:32,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:32,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:32,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 14:57:32,086 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-12-01 14:57:32,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:32,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455542137] [2020-12-01 14:57:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455542137] [2020-12-01 14:57:32,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:32,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 14:57:32,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914691540] [2020-12-01 14:57:32,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:32,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-01 14:57:32,275 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-12-01 14:57:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:32,442 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-12-01 14:57:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:32,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-01 14:57:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:32,445 INFO L225 Difference]: With dead ends: 46 [2020-12-01 14:57:32,446 INFO L226 Difference]: Without dead ends: 46 [2020-12-01 14:57:32,447 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 [2020-12-01 14:57:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-01 14:57:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-01 14:57:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-01 14:57:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-01 14:57:32,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-12-01 14:57:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:32,460 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-01 14:57:32,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-01 14:57:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 14:57:32,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:32,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:32,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 14:57:32,463 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-12-01 14:57:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:32,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537633203] [2020-12-01 14:57:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:32,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537633203] [2020-12-01 14:57:32,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:32,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-01 14:57:32,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526809653] [2020-12-01 14:57:32,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:32,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:32,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-01 14:57:32,582 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-12-01 14:57:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:32,781 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-12-01 14:57:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:32,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-01 14:57:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:32,783 INFO L225 Difference]: With dead ends: 61 [2020-12-01 14:57:32,783 INFO L226 Difference]: Without dead ends: 61 [2020-12-01 14:57:32,784 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 [2020-12-01 14:57:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-01 14:57:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-12-01 14:57:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-01 14:57:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-01 14:57:32,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 15 [2020-12-01 14:57:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:32,791 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-01 14:57:32,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-01 14:57:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 14:57:32,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:32,792 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:32,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 14:57:32,792 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:32,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-12-01 14:57:32,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:32,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266575758] [2020-12-01 14:57:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:32,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266575758] [2020-12-01 14:57:32,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425833359] [2020-12-01 14:57:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:32,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 14:57:32,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:33,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:33,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-12-01 14:57:33,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472342721] [2020-12-01 14:57:33,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:33,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:33,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:57:33,139 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 6 states. [2020-12-01 14:57:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:33,273 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-12-01 14:57:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:33,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-01 14:57:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:33,280 INFO L225 Difference]: With dead ends: 72 [2020-12-01 14:57:33,280 INFO L226 Difference]: Without dead ends: 69 [2020-12-01 14:57:33,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:57:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-01 14:57:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-12-01 14:57:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 14:57:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-01 14:57:33,296 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-12-01 14:57:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:33,297 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-01 14:57:33,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-01 14:57:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 14:57:33,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:33,298 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] [2020-12-01 14:57:33,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 14:57:33,499 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-12-01 14:57:33,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:33,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472229157] [2020-12-01 14:57:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:33,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:33,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472229157] [2020-12-01 14:57:33,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:33,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 14:57:33,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011403875] [2020-12-01 14:57:33,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:33,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:33,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:33,607 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-12-01 14:57:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:33,688 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-01 14:57:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:33,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-01 14:57:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:33,690 INFO L225 Difference]: With dead ends: 50 [2020-12-01 14:57:33,690 INFO L226 Difference]: Without dead ends: 50 [2020-12-01 14:57:33,691 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 [2020-12-01 14:57:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-01 14:57:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-01 14:57:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-01 14:57:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-01 14:57:33,703 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 20 [2020-12-01 14:57:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:33,703 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-01 14:57:33,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-01 14:57:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 14:57:33,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:33,705 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] [2020-12-01 14:57:33,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-01 14:57:33,705 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:33,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234190, now seen corresponding path program 1 times [2020-12-01 14:57:33,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:33,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092471801] [2020-12-01 14:57:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:33,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:33,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092471801] [2020-12-01 14:57:33,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:33,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:33,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081576524] [2020-12-01 14:57:33,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 14:57:33,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:33,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 14:57:33,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:57:33,852 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2020-12-01 14:57:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:33,946 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-12-01 14:57:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:33,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-01 14:57:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:33,948 INFO L225 Difference]: With dead ends: 54 [2020-12-01 14:57:33,948 INFO L226 Difference]: Without dead ends: 54 [2020-12-01 14:57:33,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:57:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-01 14:57:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-12-01 14:57:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 14:57:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-01 14:57:33,965 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 20 [2020-12-01 14:57:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:33,966 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-01 14:57:33,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 14:57:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-01 14:57:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 14:57:33,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:33,968 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] [2020-12-01 14:57:33,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-01 14:57:33,968 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:33,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2011781567, now seen corresponding path program 1 times [2020-12-01 14:57:33,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:33,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380565007] [2020-12-01 14:57:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380565007] [2020-12-01 14:57:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668612185] [2020-12-01 14:57:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 14:57:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:34,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:34,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-12-01 14:57:34,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196434327] [2020-12-01 14:57:34,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 14:57:34,186 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 6 states. [2020-12-01 14:57:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:34,288 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-12-01 14:57:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 14:57:34,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-01 14:57:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:34,290 INFO L225 Difference]: With dead ends: 76 [2020-12-01 14:57:34,290 INFO L226 Difference]: Without dead ends: 76 [2020-12-01 14:57:34,290 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 [2020-12-01 14:57:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-01 14:57:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-12-01 14:57:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 14:57:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-12-01 14:57:34,300 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 26 [2020-12-01 14:57:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:34,302 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-12-01 14:57:34,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-12-01 14:57:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 14:57:34,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:34,304 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] [2020-12-01 14:57:34,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:34,530 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1143280978, now seen corresponding path program 1 times [2020-12-01 14:57:34,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:34,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832205583] [2020-12-01 14:57:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:57:34,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832205583] [2020-12-01 14:57:34,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178859920] [2020-12-01 14:57:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 14:57:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:57:34,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:34,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-12-01 14:57:34,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7227293] [2020-12-01 14:57:34,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:34,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:34,798 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 6 states. [2020-12-01 14:57:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:34,908 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-12-01 14:57:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:34,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-12-01 14:57:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:34,909 INFO L225 Difference]: With dead ends: 68 [2020-12-01 14:57:34,909 INFO L226 Difference]: Without dead ends: 65 [2020-12-01 14:57:34,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-01 14:57:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-01 14:57:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-12-01 14:57:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 14:57:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-12-01 14:57:34,919 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2020-12-01 14:57:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:34,919 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-12-01 14:57:34,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-12-01 14:57:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-01 14:57:34,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:34,926 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] [2020-12-01 14:57:35,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-01 14:57:35,154 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1735380924, now seen corresponding path program 1 times [2020-12-01 14:57:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:35,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47260958] [2020-12-01 14:57:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-01 14:57:35,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47260958] [2020-12-01 14:57:35,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678794305] [2020-12-01 14:57:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 14:57:35,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-01 14:57:35,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:35,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-12-01 14:57:35,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087038699] [2020-12-01 14:57:35,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 14:57:35,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 14:57:35,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:57:35,337 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 5 states. [2020-12-01 14:57:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:35,445 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-12-01 14:57:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 14:57:35,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-01 14:57:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:35,448 INFO L225 Difference]: With dead ends: 70 [2020-12-01 14:57:35,450 INFO L226 Difference]: Without dead ends: 70 [2020-12-01 14:57:35,451 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 [2020-12-01 14:57:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-01 14:57:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-01 14:57:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-01 14:57:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-12-01 14:57:35,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 32 [2020-12-01 14:57:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:35,456 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-12-01 14:57:35,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 14:57:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-12-01 14:57:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-01 14:57:35,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:35,461 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] [2020-12-01 14:57:35,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:35,678 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2037766250, now seen corresponding path program 1 times [2020-12-01 14:57:35,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:35,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757023748] [2020-12-01 14:57:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 14:57:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757023748] [2020-12-01 14:57:35,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:35,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-01 14:57:35,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319293995] [2020-12-01 14:57:35,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 14:57:35,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 14:57:35,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-01 14:57:35,772 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 7 states. [2020-12-01 14:57:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:35,905 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-01 14:57:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 14:57:35,906 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-12-01 14:57:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:35,907 INFO L225 Difference]: With dead ends: 62 [2020-12-01 14:57:35,907 INFO L226 Difference]: Without dead ends: 62 [2020-12-01 14:57:35,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-01 14:57:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-01 14:57:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-01 14:57:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-01 14:57:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-01 14:57:35,910 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2020-12-01 14:57:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:35,911 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-01 14:57:35,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 14:57:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-01 14:57:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 14:57:35,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:35,912 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] [2020-12-01 14:57:35,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-01 14:57:35,913 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:35,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1978883467, now seen corresponding path program 2 times [2020-12-01 14:57:35,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:35,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883384652] [2020-12-01 14:57:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:57:35,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883384652] [2020-12-01 14:57:35,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71705563] [2020-12-01 14:57:35,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:36,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:57:36,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:36,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 14:57:36,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:57:36,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:36,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-01 14:57:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811037196] [2020-12-01 14:57:36,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 14:57:36,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 14:57:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:57:36,207 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-01 14:57:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:36,497 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-12-01 14:57:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 14:57:36,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-01 14:57:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:36,500 INFO L225 Difference]: With dead ends: 72 [2020-12-01 14:57:36,500 INFO L226 Difference]: Without dead ends: 69 [2020-12-01 14:57:36,500 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 [2020-12-01 14:57:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-01 14:57:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-12-01 14:57:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-01 14:57:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-12-01 14:57:36,504 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2020-12-01 14:57:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:36,504 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-12-01 14:57:36,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 14:57:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-12-01 14:57:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 14:57:36,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:36,506 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] [2020-12-01 14:57:36,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 14:57:36,720 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1601507541, now seen corresponding path program 2 times [2020-12-01 14:57:36,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:36,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345411146] [2020-12-01 14:57:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:36,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:36,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345411146] [2020-12-01 14:57:36,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334559311] [2020-12-01 14:57:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:36,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:57:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 14:57:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:37,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:37,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-12-01 14:57:37,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512124767] [2020-12-01 14:57:37,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 14:57:37,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 14:57:37,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:57:37,008 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 13 states. [2020-12-01 14:57:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:37,299 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-12-01 14:57:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 14:57:37,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-01 14:57:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:37,301 INFO L225 Difference]: With dead ends: 94 [2020-12-01 14:57:37,301 INFO L226 Difference]: Without dead ends: 94 [2020-12-01 14:57:37,302 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 [2020-12-01 14:57:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-01 14:57:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-12-01 14:57:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-01 14:57:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-12-01 14:57:37,307 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 37 [2020-12-01 14:57:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:37,307 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-12-01 14:57:37,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 14:57:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-12-01 14:57:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-01 14:57:37,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:37,309 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] [2020-12-01 14:57:37,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:37,534 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1930842354, now seen corresponding path program 3 times [2020-12-01 14:57:37,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:37,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118473727] [2020-12-01 14:57:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:37,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:37,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:37,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 14:57:37,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118473727] [2020-12-01 14:57:37,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2338720] [2020-12-01 14:57:37,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:37,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-01 14:57:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 14:57:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:37,778 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2020-12-01 14:57:37,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:37,798 INFO L382 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 [2020-12-01 14:57:37,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:37,809 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:37,817 INFO L382 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 [2020-12-01 14:57:37,819 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:37,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:37,828 INFO L547 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. [2020-12-01 14:57:37,828 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-01 14:57:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 14:57:38,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:38,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-01 14:57:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351642485] [2020-12-01 14:57:38,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 14:57:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 14:57:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:38,108 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 9 states. [2020-12-01 14:57:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:38,351 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-01 14:57:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 14:57:38,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-01 14:57:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:38,352 INFO L225 Difference]: With dead ends: 82 [2020-12-01 14:57:38,353 INFO L226 Difference]: Without dead ends: 82 [2020-12-01 14:57:38,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-01 14:57:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-01 14:57:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-12-01 14:57:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-01 14:57:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-12-01 14:57:38,357 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 41 [2020-12-01 14:57:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:38,358 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-12-01 14:57:38,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 14:57:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-12-01 14:57:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-01 14:57:38,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:38,359 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] [2020-12-01 14:57:38,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-01 14:57:38,571 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:38,571 INFO L82 PathProgramCache]: Analyzing trace with hash 492189859, now seen corresponding path program 2 times [2020-12-01 14:57:38,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:38,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646715842] [2020-12-01 14:57:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:38,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:38,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:38,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-01 14:57:38,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646715842] [2020-12-01 14:57:38,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253154908] [2020-12-01 14:57:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:38,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-01 14:57:38,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 14:57:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:38,737 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_25|]} [2020-12-01 14:57:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:38,742 INFO L382 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 [2020-12-01 14:57:38,743 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:38,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:38,768 INFO L382 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 [2020-12-01 14:57:38,769 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:38,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:38,776 INFO L547 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. [2020-12-01 14:57:38,776 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-01 14:57:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-01 14:57:39,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:39,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-12-01 14:57:39,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497014520] [2020-12-01 14:57:39,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 14:57:39,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:39,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 14:57:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:39,050 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-12-01 14:57:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:39,124 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-12-01 14:57:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 14:57:39,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-12-01 14:57:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:39,133 INFO L225 Difference]: With dead ends: 81 [2020-12-01 14:57:39,133 INFO L226 Difference]: Without dead ends: 81 [2020-12-01 14:57:39,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-01 14:57:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-01 14:57:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-01 14:57:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-01 14:57:39,142 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 47 [2020-12-01 14:57:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:39,142 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-01 14:57:39,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 14:57:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-01 14:57:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-01 14:57:39,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:39,144 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] [2020-12-01 14:57:39,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 14:57:39,358 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -190258011, now seen corresponding path program 1 times [2020-12-01 14:57:39,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:39,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673040073] [2020-12-01 14:57:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:39,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:39,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:39,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 14:57:39,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673040073] [2020-12-01 14:57:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329757026] [2020-12-01 14:57:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 14:57:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 14:57:39,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:39,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-12-01 14:57:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052764908] [2020-12-01 14:57:39,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 14:57:39,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:39,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 14:57:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 14:57:39,616 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 7 states. [2020-12-01 14:57:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:39,794 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-12-01 14:57:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:39,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-12-01 14:57:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:39,796 INFO L225 Difference]: With dead ends: 107 [2020-12-01 14:57:39,796 INFO L226 Difference]: Without dead ends: 107 [2020-12-01 14:57:39,797 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 [2020-12-01 14:57:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-01 14:57:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-12-01 14:57:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-01 14:57:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-12-01 14:57:39,804 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 50 [2020-12-01 14:57:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:39,804 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-12-01 14:57:39,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 14:57:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-12-01 14:57:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-01 14:57:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:39,806 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] [2020-12-01 14:57:40,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-01 14:57:40,023 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2025940537, now seen corresponding path program 3 times [2020-12-01 14:57:40,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:40,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043695302] [2020-12-01 14:57:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:40,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:40,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:40,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-01 14:57:40,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043695302] [2020-12-01 14:57:40,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905542685] [2020-12-01 14:57:40,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:40,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-01 14:57:40,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 14:57:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-01 14:57:40,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:40,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2020-12-01 14:57:40,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714201318] [2020-12-01 14:57:40,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 14:57:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:40,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 14:57:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-01 14:57:40,407 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 12 states. [2020-12-01 14:57:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:40,772 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-12-01 14:57:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 14:57:40,773 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-12-01 14:57:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:40,774 INFO L225 Difference]: With dead ends: 103 [2020-12-01 14:57:40,774 INFO L226 Difference]: Without dead ends: 103 [2020-12-01 14:57:40,775 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 [2020-12-01 14:57:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-01 14:57:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-12-01 14:57:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-01 14:57:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-12-01 14:57:40,779 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 58 [2020-12-01 14:57:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:40,780 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-12-01 14:57:40,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 14:57:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-12-01 14:57:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-01 14:57:40,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:40,781 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] [2020-12-01 14:57:40,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 14:57:40,998 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:40,998 INFO L82 PathProgramCache]: Analyzing trace with hash 746278286, now seen corresponding path program 4 times [2020-12-01 14:57:40,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:40,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449396794] [2020-12-01 14:57:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:41,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:41,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:41,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:41,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-01 14:57:41,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449396794] [2020-12-01 14:57:41,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431649193] [2020-12-01 14:57:41,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:41,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:57:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 14:57:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-01 14:57:41,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:41,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2020-12-01 14:57:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813051965] [2020-12-01 14:57:41,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 14:57:41,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 14:57:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-12-01 14:57:41,393 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 16 states. [2020-12-01 14:57:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:42,058 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-12-01 14:57:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-01 14:57:42,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-12-01 14:57:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:42,060 INFO L225 Difference]: With dead ends: 104 [2020-12-01 14:57:42,060 INFO L226 Difference]: Without dead ends: 101 [2020-12-01 14:57:42,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-12-01 14:57:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-01 14:57:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-12-01 14:57:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-01 14:57:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-12-01 14:57:42,065 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 62 [2020-12-01 14:57:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:42,065 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-12-01 14:57:42,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 14:57:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-12-01 14:57:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-01 14:57:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:42,067 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] [2020-12-01 14:57:42,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:42,290 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1227025103, now seen corresponding path program 5 times [2020-12-01 14:57:42,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:42,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721741737] [2020-12-01 14:57:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:42,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:42,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:42,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-01 14:57:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721741737] [2020-12-01 14:57:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473195786] [2020-12-01 14:57:42,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:42,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-01 14:57:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 14:57:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:42,516 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_26|]} [2020-12-01 14:57:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:42,523 INFO L382 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 [2020-12-01 14:57:42,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:42,532 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:42,536 INFO L382 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 [2020-12-01 14:57:42,537 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:42,543 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:42,543 INFO L547 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. [2020-12-01 14:57:42,544 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-01 14:57:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-01 14:57:42,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:42,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2020-12-01 14:57:42,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644216802] [2020-12-01 14:57:42,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 14:57:42,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:42,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 14:57:42,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:57:42,927 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 11 states. [2020-12-01 14:57:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:43,338 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-12-01 14:57:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 14:57:43,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-01 14:57:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:43,341 INFO L225 Difference]: With dead ends: 95 [2020-12-01 14:57:43,341 INFO L226 Difference]: Without dead ends: 95 [2020-12-01 14:57:43,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-01 14:57:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-01 14:57:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-12-01 14:57:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-01 14:57:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-12-01 14:57:43,350 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 67 [2020-12-01 14:57:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:43,351 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-12-01 14:57:43,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 14:57:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-12-01 14:57:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-01 14:57:43,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:43,353 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] [2020-12-01 14:57:43,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:43,578 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash -199290008, now seen corresponding path program 2 times [2020-12-01 14:57:43,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:43,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617854318] [2020-12-01 14:57:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:43,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:43,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:43,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:43,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-01 14:57:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617854318] [2020-12-01 14:57:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124561723] [2020-12-01 14:57:43,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:43,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-01 14:57:43,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:43,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 14:57:43,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:43,760 INFO L348 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-12-01 14:57:43,761 INFO L382 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 [2020-12-01 14:57:43,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:43,772 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:43,775 INFO L547 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. [2020-12-01 14:57:43,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-12-01 14:57:43,935 INFO L348 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-12-01 14:57:43,936 INFO L382 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 [2020-12-01 14:57:43,938 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:43,943 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:43,945 INFO L547 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. [2020-12-01 14:57:43,945 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-12-01 14:57:44,122 INFO L348 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-12-01 14:57:44,122 INFO L382 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 [2020-12-01 14:57:44,125 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:44,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:44,138 INFO L547 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. [2020-12-01 14:57:44,139 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-12-01 14:57:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-01 14:57:44,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:44,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-12-01 14:57:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341918088] [2020-12-01 14:57:44,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:57:44,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:57:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:57:44,405 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 6 states. [2020-12-01 14:57:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:44,507 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-12-01 14:57:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:57:44,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-12-01 14:57:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:44,509 INFO L225 Difference]: With dead ends: 92 [2020-12-01 14:57:44,510 INFO L226 Difference]: Without dead ends: 89 [2020-12-01 14:57:44,512 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 [2020-12-01 14:57:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-01 14:57:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-12-01 14:57:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-01 14:57:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-12-01 14:57:44,518 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2020-12-01 14:57:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:44,518 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-12-01 14:57:44,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:57:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-12-01 14:57:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-01 14:57:44,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:44,520 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] [2020-12-01 14:57:44,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-01 14:57:44,734 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1882931165, now seen corresponding path program 1 times [2020-12-01 14:57:44,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:44,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686905145] [2020-12-01 14:57:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:44,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:44,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-01 14:57:44,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686905145] [2020-12-01 14:57:44,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748656617] [2020-12-01 14:57:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 14:57:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-01 14:57:45,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:45,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-12-01 14:57:45,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224548738] [2020-12-01 14:57:45,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 14:57:45,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:45,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 14:57:45,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 14:57:45,046 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 8 states. [2020-12-01 14:57:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:45,216 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-12-01 14:57:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 14:57:45,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-01 14:57:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:45,219 INFO L225 Difference]: With dead ends: 108 [2020-12-01 14:57:45,219 INFO L226 Difference]: Without dead ends: 108 [2020-12-01 14:57:45,219 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 [2020-12-01 14:57:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-01 14:57:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2020-12-01 14:57:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-01 14:57:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-12-01 14:57:45,224 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-12-01 14:57:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:45,224 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-12-01 14:57:45,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 14:57:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-12-01 14:57:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-01 14:57:45,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:45,226 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] [2020-12-01 14:57:45,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:45,442 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1445837420, now seen corresponding path program 6 times [2020-12-01 14:57:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:45,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078909390] [2020-12-01 14:57:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:45,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:45,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:45,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-12-01 14:57:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-01 14:57:45,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078909390] [2020-12-01 14:57:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866002375] [2020-12-01 14:57:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:45,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-01 14:57:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 14:57:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:45,709 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_29|]} [2020-12-01 14:57:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:45,715 INFO L382 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 [2020-12-01 14:57:45,716 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:45,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:45,733 INFO L382 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 [2020-12-01 14:57:45,735 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:45,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:45,744 INFO L547 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. [2020-12-01 14:57:45,744 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-01 14:57:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 83 proven. 67 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-01 14:57:46,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:46,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2020-12-01 14:57:46,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240187205] [2020-12-01 14:57:46,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 14:57:46,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:46,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 14:57:46,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-12-01 14:57:46,471 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 20 states. [2020-12-01 14:57:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:47,622 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-12-01 14:57:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-01 14:57:47,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-12-01 14:57:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:47,625 INFO L225 Difference]: With dead ends: 106 [2020-12-01 14:57:47,625 INFO L226 Difference]: Without dead ends: 96 [2020-12-01 14:57:47,626 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 [2020-12-01 14:57:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-01 14:57:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-12-01 14:57:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-01 14:57:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-12-01 14:57:47,635 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 93 [2020-12-01 14:57:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:47,636 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-12-01 14:57:47,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 14:57:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-12-01 14:57:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-01 14:57:47,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:47,638 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] [2020-12-01 14:57:47,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-01 14:57:47,866 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:47,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1309983867, now seen corresponding path program 2 times [2020-12-01 14:57:47,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:47,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800314110] [2020-12-01 14:57:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:47,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:47,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:47,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-12-01 14:57:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-12-01 14:57:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800314110] [2020-12-01 14:57:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629414538] [2020-12-01 14:57:48,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:48,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:57:48,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 14:57:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-12-01 14:57:48,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:48,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-12-01 14:57:48,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202817248] [2020-12-01 14:57:48,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 14:57:48,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 14:57:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:48,233 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 9 states. [2020-12-01 14:57:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:48,329 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-12-01 14:57:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 14:57:48,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-12-01 14:57:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:48,332 INFO L225 Difference]: With dead ends: 103 [2020-12-01 14:57:48,332 INFO L226 Difference]: Without dead ends: 103 [2020-12-01 14:57:48,332 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 [2020-12-01 14:57:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-01 14:57:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-12-01 14:57:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-01 14:57:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-12-01 14:57:48,339 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 108 [2020-12-01 14:57:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:48,339 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-12-01 14:57:48,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 14:57:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-12-01 14:57:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-01 14:57:48,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:48,342 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] [2020-12-01 14:57:48,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:48,566 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-12-01 14:57:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash 472765411, now seen corresponding path program 3 times [2020-12-01 14:57:48,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:48,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426857250] [2020-12-01 14:57:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 14:57:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 14:57:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 14:57:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 14:57:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-12-01 14:57:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-12-01 14:57:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-12-01 14:57:48,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426857250] [2020-12-01 14:57:48,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631332395] [2020-12-01 14:57:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/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 [2020-12-01 14:57:48,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-01 14:57:48,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 14:57:48,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-12-01 14:57:49,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:57:49,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-12-01 14:57:49,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27781362] [2020-12-01 14:57:49,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 14:57:49,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 14:57:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-01 14:57:49,078 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 15 states. [2020-12-01 14:57:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:49,427 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-12-01 14:57:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 14:57:49,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 139 [2020-12-01 14:57:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:49,429 INFO L225 Difference]: With dead ends: 110 [2020-12-01 14:57:49,429 INFO L226 Difference]: Without dead ends: 0 [2020-12-01 14:57:49,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-12-01 14:57:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-01 14:57:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-01 14:57:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-01 14:57:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-01 14:57:49,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-12-01 14:57:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:49,431 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 14:57:49,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 14:57:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-01 14:57:49,431 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 14:57:49,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-01 14:57:49,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 02:57:49 BoogieIcfgContainer [2020-12-01 14:57:49,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 14:57:49,646 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 14:57:49,646 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 14:57:49,646 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 14:57:49,647 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:30" (3/4) ... [2020-12-01 14:57:49,650 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 14:57:49,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-12-01 14:57:49,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-12-01 14:57:49,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-12-01 14:57:49,665 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-12-01 14:57:49,665 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-01 14:57:49,665 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-01 14:57:49,666 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 14:57:49,695 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_29681c69-d6d4-4537-bfdc-edeee7869f47/bin/uautomizer/witness.graphml [2020-12-01 14:57:49,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 14:57:49,696 INFO L168 Benchmark]: Toolchain (without parser) took 19593.39 ms. Allocated memory was 96.5 MB in the beginning and 249.6 MB in the end (delta: 153.1 MB). Free memory was 65.1 MB in the beginning and 220.8 MB in the end (delta: -155.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:49,697 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory was 53.8 MB in the beginning and 53.8 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:49,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.22 ms. Allocated memory is still 96.5 MB. Free memory was 64.9 MB in the beginning and 75.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:49,698 INFO L168 Benchmark]: Boogie Preprocessor took 37.49 ms. Allocated memory is still 96.5 MB. Free memory was 75.0 MB in the beginning and 73.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:49,698 INFO L168 Benchmark]: RCFGBuilder took 510.27 ms. Allocated memory is still 96.5 MB. Free memory was 73.7 MB in the beginning and 58.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:49,699 INFO L168 Benchmark]: TraceAbstraction took 18694.73 ms. Allocated memory was 96.5 MB in the beginning and 249.6 MB in the end (delta: 153.1 MB). Free memory was 57.9 MB in the beginning and 223.5 MB in the end (delta: -165.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:49,699 INFO L168 Benchmark]: Witness Printer took 49.68 ms. Allocated memory is still 249.6 MB. Free memory was 223.5 MB in the beginning and 220.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:49,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory was 53.8 MB in the beginning and 53.8 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.22 ms. Allocated memory is still 96.5 MB. Free memory was 64.9 MB in the beginning and 75.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.49 ms. Allocated memory is still 96.5 MB. Free memory was 75.0 MB in the beginning and 73.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 510.27 ms. Allocated memory is still 96.5 MB. Free memory was 73.7 MB in the beginning and 58.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18694.73 ms. Allocated memory was 96.5 MB in the beginning and 249.6 MB in the end (delta: 153.1 MB). Free memory was 57.9 MB in the beginning and 223.5 MB in the end (delta: -165.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 49.68 ms. Allocated memory is still 249.6 MB. Free memory was 223.5 MB in the beginning and 220.8 MB in the end (delta: 2.6 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: 18.6s, OverallIterations: 25, TraceHistogramMax: 14, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 606 SDtfs, 1409 SDslu, 1233 SDs, 0 SdLazy, 3675 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1319 GetRequests, 1048 SyntacticMatches, 27 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3.9s 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: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 209 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 2125 NumberOfCodeBlocks, 1811 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2083 ConstructedInterpolants, 270 QuantifiedInterpolants, 603802 SizeOfPredicates, 26 NumberOfNonLiveVariables, 2311 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 42 InterpolantComputations, 12 PerfectInterpolantSequences, 3548/4007 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...