./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/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 7862960b0aa057ac19174563f251d134d1269c2b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:48:24,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:48:24,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:48:24,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:48:24,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:48:24,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:48:24,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:48:24,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:48:24,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:48:24,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:48:24,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:48:24,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:48:24,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:48:24,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:48:24,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:48:24,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:48:24,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:48:24,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:48:24,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:48:24,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:48:24,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:48:24,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:48:24,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:48:24,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:48:24,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:48:24,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:48:24,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:48:24,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:48:24,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:48:24,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:48:24,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:48:24,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:48:24,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:48:24,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:48:24,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:48:24,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:48:24,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:48:24,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:48:24,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:48:24,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:48:24,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:48:24,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 00:48:24,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:48:24,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:48:24,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:48:24,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:48:24,617 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:48:24,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:48:24,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:48:24,618 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:48:24,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:48:24,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:48:24,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:48:24,620 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 00:48:24,620 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 00:48:24,620 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 00:48:24,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:48:24,621 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 00:48:24,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:48:24,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:48:24,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:48:24,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:48:24,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:48:24,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:48:24,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:48:24,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:48:24,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:48:24,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:48:24,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:48:24,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:48:24,624 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_ee4c74a4-a451-4616-bdba-a29804c18a77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7862960b0aa057ac19174563f251d134d1269c2b [2020-11-30 00:48:24,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:48:24,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:48:24,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:48:24,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:48:24,943 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:48:24,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-11-30 00:48:25,026 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/data/a2ccbf182/5a6ca49653234e5b95e6a456e8ae7659/FLAG843998ce7 [2020-11-30 00:48:25,643 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:48:25,644 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-11-30 00:48:25,653 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/data/a2ccbf182/5a6ca49653234e5b95e6a456e8ae7659/FLAG843998ce7 [2020-11-30 00:48:25,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/data/a2ccbf182/5a6ca49653234e5b95e6a456e8ae7659 [2020-11-30 00:48:25,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:48:25,995 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 00:48:26,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:48:26,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:48:26,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:48:26,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:48:25" (1/1) ... [2020-11-30 00:48:26,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f2e958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26, skipping insertion in model container [2020-11-30 00:48:26,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:48:25" (1/1) ... [2020-11-30 00:48:26,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:48:26,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:48:26,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:48:26,368 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:48:26,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:48:26,449 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:48:26,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26 WrapperNode [2020-11-30 00:48:26,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:48:26,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:48:26,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:48:26,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:48:26,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... [2020-11-30 00:48:26,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:48:26,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:48:26,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:48:26,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:48:26,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:48:26,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 00:48:26,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:48:26,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-30 00:48:26,628 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-30 00:48:26,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-30 00:48:26,629 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-30 00:48:26,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 00:48:26,630 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-30 00:48:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-30 00:48:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-30 00:48:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-30 00:48:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-30 00:48:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-30 00:48:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:48:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-30 00:48:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-30 00:48:26,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-30 00:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-30 00:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 00:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 00:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-30 00:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 00:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 00:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:48:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:48:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:48:27,204 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:48:27,205 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-30 00:48:27,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:48:27 BoogieIcfgContainer [2020-11-30 00:48:27,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:48:27,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:48:27,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:48:27,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:48:27,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:48:25" (1/3) ... [2020-11-30 00:48:27,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5827d800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:48:27, skipping insertion in model container [2020-11-30 00:48:27,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:48:26" (2/3) ... [2020-11-30 00:48:27,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5827d800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:48:27, skipping insertion in model container [2020-11-30 00:48:27,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:48:27" (3/3) ... [2020-11-30 00:48:27,218 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-11-30 00:48:27,231 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:48:27,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-11-30 00:48:27,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-11-30 00:48:27,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:48:27,273 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 00:48:27,273 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:48:27,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:48:27,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:48:27,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:48:27,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:48:27,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:48:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-11-30 00:48:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:48:27,304 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:27,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:27,305 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1929799143, now seen corresponding path program 1 times [2020-11-30 00:48:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:27,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426350883] [2020-11-30 00:48:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:27,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:27,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:27,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:27,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426350883] [2020-11-30 00:48:27,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:27,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:48:27,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666768314] [2020-11-30 00:48:27,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:48:27,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:48:27,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:48:27,755 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 4 states. [2020-11-30 00:48:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:28,094 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-11-30 00:48:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:48:28,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-30 00:48:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:28,106 INFO L225 Difference]: With dead ends: 63 [2020-11-30 00:48:28,107 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 00:48:28,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:48:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 00:48:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-30 00:48:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 00:48:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-11-30 00:48:28,182 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 25 [2020-11-30 00:48:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:28,182 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-11-30 00:48:28,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:48:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-11-30 00:48:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:48:28,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:28,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:28,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:48:28,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash 341451241, now seen corresponding path program 1 times [2020-11-30 00:48:28,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:28,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555885083] [2020-11-30 00:48:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:28,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:28,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:28,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555885083] [2020-11-30 00:48:28,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:28,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:48:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888585447] [2020-11-30 00:48:28,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:48:28,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:48:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:48:28,555 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 8 states. [2020-11-30 00:48:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:29,536 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-11-30 00:48:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:48:29,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-30 00:48:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:29,542 INFO L225 Difference]: With dead ends: 105 [2020-11-30 00:48:29,542 INFO L226 Difference]: Without dead ends: 105 [2020-11-30 00:48:29,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:48:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-30 00:48:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2020-11-30 00:48:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-30 00:48:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-30 00:48:29,583 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 25 [2020-11-30 00:48:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:29,584 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-30 00:48:29,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:48:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-30 00:48:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:48:29,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:29,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:29,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:48:29,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1237535227, now seen corresponding path program 1 times [2020-11-30 00:48:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:29,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485410993] [2020-11-30 00:48:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:29,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:29,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:29,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-30 00:48:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:29,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485410993] [2020-11-30 00:48:29,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:29,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:48:29,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467130319] [2020-11-30 00:48:29,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:48:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:48:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:48:29,799 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 6 states. [2020-11-30 00:48:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:30,141 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-11-30 00:48:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:48:30,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-11-30 00:48:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:30,144 INFO L225 Difference]: With dead ends: 82 [2020-11-30 00:48:30,144 INFO L226 Difference]: Without dead ends: 82 [2020-11-30 00:48:30,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:48:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-30 00:48:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-30 00:48:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-30 00:48:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-11-30 00:48:30,157 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 24 [2020-11-30 00:48:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-11-30 00:48:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:48:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-11-30 00:48:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:48:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:30,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:30,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:48:30,159 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash 291113678, now seen corresponding path program 1 times [2020-11-30 00:48:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:30,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281718059] [2020-11-30 00:48:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-30 00:48:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:30,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281718059] [2020-11-30 00:48:30,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:30,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:48:30,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577211927] [2020-11-30 00:48:30,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:48:30,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:48:30,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:48:30,303 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 6 states. [2020-11-30 00:48:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:30,653 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-11-30 00:48:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:48:30,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-30 00:48:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:30,655 INFO L225 Difference]: With dead ends: 81 [2020-11-30 00:48:30,655 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 00:48:30,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:48:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 00:48:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-30 00:48:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 00:48:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-11-30 00:48:30,666 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 25 [2020-11-30 00:48:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:30,666 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-11-30 00:48:30,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:48:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-11-30 00:48:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 00:48:30,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:30,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:30,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:48:30,673 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash 434589479, now seen corresponding path program 1 times [2020-11-30 00:48:30,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:30,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895700349] [2020-11-30 00:48:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-30 00:48:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895700349] [2020-11-30 00:48:30,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:30,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:48:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796334393] [2020-11-30 00:48:30,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:48:30,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:48:30,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:48:30,872 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 6 states. [2020-11-30 00:48:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:31,247 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-11-30 00:48:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:48:31,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-30 00:48:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:31,249 INFO L225 Difference]: With dead ends: 80 [2020-11-30 00:48:31,250 INFO L226 Difference]: Without dead ends: 80 [2020-11-30 00:48:31,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:48:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-30 00:48:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-30 00:48:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-30 00:48:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-11-30 00:48:31,281 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 26 [2020-11-30 00:48:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:31,282 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-11-30 00:48:31,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:48:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-11-30 00:48:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:48:31,284 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:31,284 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, 1] [2020-11-30 00:48:31,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:48:31,285 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:31,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:31,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1720277367, now seen corresponding path program 1 times [2020-11-30 00:48:31,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:31,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130787200] [2020-11-30 00:48:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:31,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:31,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:31,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:31,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:31,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130787200] [2020-11-30 00:48:31,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:31,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 00:48:31,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767790181] [2020-11-30 00:48:31,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:48:31,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:31,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:48:31,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:48:31,480 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 8 states. [2020-11-30 00:48:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:32,018 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-11-30 00:48:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:48:32,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-11-30 00:48:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:32,023 INFO L225 Difference]: With dead ends: 76 [2020-11-30 00:48:32,023 INFO L226 Difference]: Without dead ends: 76 [2020-11-30 00:48:32,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:48:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-30 00:48:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-30 00:48:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-30 00:48:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-11-30 00:48:32,033 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 27 [2020-11-30 00:48:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:32,033 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-11-30 00:48:32,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:48:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-11-30 00:48:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:48:32,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:32,035 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, 1] [2020-11-30 00:48:32,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 00:48:32,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:32,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1720277368, now seen corresponding path program 1 times [2020-11-30 00:48:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510339417] [2020-11-30 00:48:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:32,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:32,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:32,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:32,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:32,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510339417] [2020-11-30 00:48:32,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:32,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:48:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829737690] [2020-11-30 00:48:32,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:48:32,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:48:32,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:48:32,287 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 9 states. [2020-11-30 00:48:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:33,289 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-11-30 00:48:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 00:48:33,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-11-30 00:48:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:33,292 INFO L225 Difference]: With dead ends: 93 [2020-11-30 00:48:33,293 INFO L226 Difference]: Without dead ends: 93 [2020-11-30 00:48:33,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-30 00:48:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-30 00:48:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-11-30 00:48:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-30 00:48:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-11-30 00:48:33,305 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 27 [2020-11-30 00:48:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:33,305 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-11-30 00:48:33,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:48:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-11-30 00:48:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:48:33,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:33,307 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, 1] [2020-11-30 00:48:33,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 00:48:33,308 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash 587372017, now seen corresponding path program 1 times [2020-11-30 00:48:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:33,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213359563] [2020-11-30 00:48:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:33,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:33,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:33,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:33,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-30 00:48:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:33,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213359563] [2020-11-30 00:48:33,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:33,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 00:48:33,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338361475] [2020-11-30 00:48:33,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:48:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:48:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:48:33,481 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 7 states. [2020-11-30 00:48:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:33,810 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-11-30 00:48:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:48:33,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-11-30 00:48:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:33,816 INFO L225 Difference]: With dead ends: 75 [2020-11-30 00:48:33,816 INFO L226 Difference]: Without dead ends: 70 [2020-11-30 00:48:33,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:48:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-30 00:48:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-30 00:48:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 00:48:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-11-30 00:48:33,832 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 27 [2020-11-30 00:48:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:33,833 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-11-30 00:48:33,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:48:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-11-30 00:48:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:48:33,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:33,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:33,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 00:48:33,835 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1788990832, now seen corresponding path program 1 times [2020-11-30 00:48:33,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:33,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721824761] [2020-11-30 00:48:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:34,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:34,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:34,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:34,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721824761] [2020-11-30 00:48:34,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:48:34,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:48:34,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746254988] [2020-11-30 00:48:34,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:48:34,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:48:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:48:34,128 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 9 states. [2020-11-30 00:48:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:35,041 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-11-30 00:48:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:48:35,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-30 00:48:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:35,043 INFO L225 Difference]: With dead ends: 84 [2020-11-30 00:48:35,043 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 00:48:35,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:48:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 00:48:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2020-11-30 00:48:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 00:48:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-11-30 00:48:35,051 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 28 [2020-11-30 00:48:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:35,052 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-11-30 00:48:35,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:48:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-11-30 00:48:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-30 00:48:35,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:35,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1] [2020-11-30 00:48:35,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 00:48:35,054 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2033841114, now seen corresponding path program 1 times [2020-11-30 00:48:35,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:35,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23596555] [2020-11-30 00:48:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:35,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:35,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:35,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23596555] [2020-11-30 00:48:35,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97385332] [2020-11-30 00:48:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:48:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:48:35,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:48:35,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:48:35,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:48:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:35,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:48:35,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2020-11-30 00:48:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661213838] [2020-11-30 00:48:35,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:48:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:48:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:48:35,651 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-11-30 00:48:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:36,150 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-11-30 00:48:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:48:36,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-11-30 00:48:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:36,151 INFO L225 Difference]: With dead ends: 88 [2020-11-30 00:48:36,152 INFO L226 Difference]: Without dead ends: 88 [2020-11-30 00:48:36,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:48:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-30 00:48:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-11-30 00:48:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-30 00:48:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-11-30 00:48:36,159 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 37 [2020-11-30 00:48:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:36,159 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-11-30 00:48:36,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:48:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-11-30 00:48:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 00:48:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:36,161 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:36,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 00:48:36,362 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 314340137, now seen corresponding path program 1 times [2020-11-30 00:48:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:36,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763223739] [2020-11-30 00:48:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-30 00:48:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:48:36,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763223739] [2020-11-30 00:48:36,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947585203] [2020-11-30 00:48:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-30 00:48:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:48:36,768 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-30 00:48:36,768 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:48:36,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:48:36,777 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 00:48:36,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-11-30 00:48:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:48:38,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:48:38,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2020-11-30 00:48:38,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052548952] [2020-11-30 00:48:38,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 00:48:38,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 00:48:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=366, Unknown=1, NotChecked=0, Total=420 [2020-11-30 00:48:38,171 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 21 states. [2020-11-30 00:48:38,926 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-11-30 00:48:40,374 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-11-30 00:48:40,683 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-11-30 00:48:41,038 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-11-30 00:48:41,186 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-11-30 00:48:41,326 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-11-30 00:48:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:42,288 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-11-30 00:48:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 00:48:42,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-11-30 00:48:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:42,291 INFO L225 Difference]: With dead ends: 106 [2020-11-30 00:48:42,291 INFO L226 Difference]: Without dead ends: 104 [2020-11-30 00:48:42,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=245, Invalid=1083, Unknown=4, NotChecked=0, Total=1332 [2020-11-30 00:48:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-30 00:48:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2020-11-30 00:48:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 00:48:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-11-30 00:48:42,309 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 39 [2020-11-30 00:48:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:42,310 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-11-30 00:48:42,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 00:48:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-11-30 00:48:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 00:48:42,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:42,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:42,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:42,545 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1154609631, now seen corresponding path program 1 times [2020-11-30 00:48:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:42,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701803889] [2020-11-30 00:48:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-30 00:48:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:48:42,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701803889] [2020-11-30 00:48:42,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681441220] [2020-11-30 00:48:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 00:48:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:48:43,016 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-30 00:48:43,016 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:48:43,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:48:43,031 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 00:48:43,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-11-30 00:48:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:43,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:48:43,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2020-11-30 00:48:43,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711533109] [2020-11-30 00:48:43,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 00:48:43,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 00:48:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-11-30 00:48:43,730 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 21 states. [2020-11-30 00:48:44,738 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-11-30 00:48:45,082 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-11-30 00:48:46,526 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-11-30 00:48:46,813 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-11-30 00:48:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:46,946 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2020-11-30 00:48:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 00:48:46,946 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-11-30 00:48:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:46,948 INFO L225 Difference]: With dead ends: 140 [2020-11-30 00:48:46,948 INFO L226 Difference]: Without dead ends: 140 [2020-11-30 00:48:46,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=257, Invalid=1129, Unknown=20, NotChecked=0, Total=1406 [2020-11-30 00:48:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-30 00:48:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2020-11-30 00:48:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-30 00:48:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-11-30 00:48:46,958 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 40 [2020-11-30 00:48:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:46,959 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-11-30 00:48:46,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 00:48:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-11-30 00:48:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-30 00:48:46,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:46,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:47,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 00:48:47,179 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash -411974559, now seen corresponding path program 1 times [2020-11-30 00:48:47,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:47,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258468139] [2020-11-30 00:48:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-30 00:48:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-30 00:48:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:48:47,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258468139] [2020-11-30 00:48:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379819847] [2020-11-30 00:48:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:48:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:48:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:48:47,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:48:47,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2020-11-30 00:48:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284374096] [2020-11-30 00:48:47,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 00:48:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 00:48:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:48:47,904 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 20 states. [2020-11-30 00:48:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:50,108 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2020-11-30 00:48:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-30 00:48:50,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-11-30 00:48:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:50,112 INFO L225 Difference]: With dead ends: 133 [2020-11-30 00:48:50,112 INFO L226 Difference]: Without dead ends: 133 [2020-11-30 00:48:50,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2020-11-30 00:48:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-30 00:48:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 97. [2020-11-30 00:48:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-30 00:48:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-11-30 00:48:50,121 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 41 [2020-11-30 00:48:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:50,122 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-11-30 00:48:50,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 00:48:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-11-30 00:48:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-30 00:48:50,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:50,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:50,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:50,354 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash -770560254, now seen corresponding path program 1 times [2020-11-30 00:48:50,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:50,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588276808] [2020-11-30 00:48:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-30 00:48:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-30 00:48:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:48:50,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588276808] [2020-11-30 00:48:50,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395282277] [2020-11-30 00:48:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 00:48:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:48:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:51,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:48:51,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2020-11-30 00:48:51,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887624060] [2020-11-30 00:48:51,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 00:48:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 00:48:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2020-11-30 00:48:51,599 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 27 states. [2020-11-30 00:48:52,514 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-11-30 00:48:54,079 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-11-30 00:48:54,497 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-11-30 00:48:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:48:55,507 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2020-11-30 00:48:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-30 00:48:55,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 43 [2020-11-30 00:48:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:48:55,519 INFO L225 Difference]: With dead ends: 158 [2020-11-30 00:48:55,519 INFO L226 Difference]: Without dead ends: 158 [2020-11-30 00:48:55,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=491, Invalid=2479, Unknown=0, NotChecked=0, Total=2970 [2020-11-30 00:48:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-30 00:48:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2020-11-30 00:48:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-30 00:48:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2020-11-30 00:48:55,537 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 43 [2020-11-30 00:48:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:48:55,538 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2020-11-30 00:48:55,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 00:48:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2020-11-30 00:48:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-30 00:48:55,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:48:55,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:48:55,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 00:48:55,769 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:48:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:48:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2050423932, now seen corresponding path program 1 times [2020-11-30 00:48:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:48:55,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530151182] [2020-11-30 00:48:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:48:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:55,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:48:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:55,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:48:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:56,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:48:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:56,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:48:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:56,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-30 00:48:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:56,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-30 00:48:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:48:56,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530151182] [2020-11-30 00:48:56,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214486782] [2020-11-30 00:48:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:48:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:48:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 00:48:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:48:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:48:56,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:48:56,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-11-30 00:48:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442023010] [2020-11-30 00:48:56,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 00:48:56,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:48:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 00:48:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:48:56,783 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 24 states. [2020-11-30 00:48:57,525 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-11-30 00:48:57,812 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-11-30 00:48:59,676 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-11-30 00:49:00,621 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-11-30 00:49:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:01,013 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-11-30 00:49:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-30 00:49:01,014 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2020-11-30 00:49:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:01,016 INFO L225 Difference]: With dead ends: 172 [2020-11-30 00:49:01,016 INFO L226 Difference]: Without dead ends: 172 [2020-11-30 00:49:01,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=546, Invalid=2210, Unknown=0, NotChecked=0, Total=2756 [2020-11-30 00:49:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-30 00:49:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2020-11-30 00:49:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-30 00:49:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2020-11-30 00:49:01,028 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 43 [2020-11-30 00:49:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:01,036 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2020-11-30 00:49:01,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 00:49:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2020-11-30 00:49:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-30 00:49:01,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:01,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:01,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:01,261 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:49:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 608414758, now seen corresponding path program 1 times [2020-11-30 00:49:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:01,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437051695] [2020-11-30 00:49:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:49:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:49:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:49:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:49:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-30 00:49:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-30 00:49:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:49:01,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437051695] [2020-11-30 00:49:01,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863609335] [2020-11-30 00:49:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:49:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:01,684 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-11-30 00:49:01,684 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:49:01,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:49:01,686 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 00:49:01,686 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-11-30 00:49:03,695 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_13 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_13) ((as const (Array Int Int)) 0))) is different from true [2020-11-30 00:49:05,713 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_14 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_14) ((as const (Array Int Int)) 0))) is different from true [2020-11-30 00:49:07,766 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_15 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_15))) is different from true [2020-11-30 00:49:07,914 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 23 [2020-11-30 00:49:07,915 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:49:07,921 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:49:07,922 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-30 00:49:07,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-11-30 00:49:08,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:49:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2020-11-30 00:49:08,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:08,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2020-11-30 00:49:08,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302053783] [2020-11-30 00:49:08,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 00:49:08,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 00:49:08,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=374, Unknown=3, NotChecked=120, Total=552 [2020-11-30 00:49:08,114 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand 24 states. [2020-11-30 00:49:12,725 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 40 [2020-11-30 00:49:14,805 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 43 [2020-11-30 00:49:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:23,555 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2020-11-30 00:49:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 00:49:23,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-11-30 00:49:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:23,557 INFO L225 Difference]: With dead ends: 132 [2020-11-30 00:49:23,557 INFO L226 Difference]: Without dead ends: 120 [2020-11-30 00:49:23,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=166, Invalid=961, Unknown=7, NotChecked=198, Total=1332 [2020-11-30 00:49:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-30 00:49:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-11-30 00:49:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-30 00:49:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2020-11-30 00:49:23,567 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 49 [2020-11-30 00:49:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:23,567 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2020-11-30 00:49:23,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 00:49:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2020-11-30 00:49:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-30 00:49:23,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:23,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:23,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 00:49:23,785 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:49:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 879330896, now seen corresponding path program 1 times [2020-11-30 00:49:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:23,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680767285] [2020-11-30 00:49:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:49:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:49:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:49:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:49:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-30 00:49:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 00:49:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:23,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-30 00:49:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:24,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-30 00:49:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:24,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-30 00:49:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-30 00:49:24,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680767285] [2020-11-30 00:49:24,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621793588] [2020-11-30 00:49:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 00:49:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 00:49:24,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:24,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 28 [2020-11-30 00:49:24,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001553564] [2020-11-30 00:49:24,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 00:49:24,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:24,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 00:49:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2020-11-30 00:49:24,915 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand 28 states. [2020-11-30 00:49:25,566 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-30 00:49:25,920 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-30 00:49:26,078 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-30 00:49:26,248 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-11-30 00:49:26,446 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-11-30 00:49:26,642 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-30 00:49:27,928 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-30 00:49:28,297 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-11-30 00:49:29,690 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-11-30 00:49:29,926 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-11-30 00:49:30,299 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-30 00:49:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:30,347 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-11-30 00:49:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 00:49:30,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-11-30 00:49:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:30,349 INFO L225 Difference]: With dead ends: 113 [2020-11-30 00:49:30,349 INFO L226 Difference]: Without dead ends: 88 [2020-11-30 00:49:30,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2020-11-30 00:49:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-30 00:49:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-11-30 00:49:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 00:49:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-11-30 00:49:30,360 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2020-11-30 00:49:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:30,361 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-11-30 00:49:30,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 00:49:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-11-30 00:49:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-30 00:49:30,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:49:30,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:49:30,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-30 00:49:30,564 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-30 00:49:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:49:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -14155442, now seen corresponding path program 1 times [2020-11-30 00:49:30,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:49:30,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985852852] [2020-11-30 00:49:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:49:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:30,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:49:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:30,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-30 00:49:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:30,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-30 00:49:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:30,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-30 00:49:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:30,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-30 00:49:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:49:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 00:49:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-30 00:49:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-30 00:49:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-30 00:49:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-30 00:49:31,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985852852] [2020-11-30 00:49:31,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044014907] [2020-11-30 00:49:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:49:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:49:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 00:49:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:49:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 00:49:31,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:49:31,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-11-30 00:49:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863927594] [2020-11-30 00:49:31,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-30 00:49:31,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:49:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-30 00:49:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 00:49:31,927 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 33 states. [2020-11-30 00:49:33,039 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-11-30 00:49:33,807 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-30 00:49:34,039 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-30 00:49:34,196 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-30 00:49:34,477 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-30 00:49:34,698 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-30 00:49:34,866 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-30 00:49:35,162 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-30 00:49:35,339 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-30 00:49:35,648 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-11-30 00:49:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:49:35,684 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-11-30 00:49:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-30 00:49:35,685 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-11-30 00:49:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:49:35,685 INFO L225 Difference]: With dead ends: 87 [2020-11-30 00:49:35,685 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:49:35,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=440, Invalid=2750, Unknown=2, NotChecked=0, Total=3192 [2020-11-30 00:49:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:49:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:49:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:49:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:49:35,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-11-30 00:49:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:49:35,687 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:49:35,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-30 00:49:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:49:35,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:49:35,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 00:49:35,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:49:35 BoogieIcfgContainer [2020-11-30 00:49:35,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:49:35,893 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:49:35,893 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:49:35,893 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:49:35,894 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:48:27" (3/4) ... [2020-11-30 00:49:35,897 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:49:35,905 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-30 00:49:35,905 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-30 00:49:35,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2020-11-30 00:49:35,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-30 00:49:35,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2020-11-30 00:49:35,921 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-11-30 00:49:35,921 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2020-11-30 00:49:35,928 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2020-11-30 00:49:35,928 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 00:49:35,928 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:49:35,929 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:49:35,986 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ee4c74a4-a451-4616-bdba-a29804c18a77/bin/uautomizer/witness.graphml [2020-11-30 00:49:35,987 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:49:35,988 INFO L168 Benchmark]: Toolchain (without parser) took 69992.80 ms. Allocated memory was 98.6 MB in the beginning and 232.8 MB in the end (delta: 134.2 MB). Free memory was 68.3 MB in the beginning and 98.9 MB in the end (delta: -30.6 MB). Peak memory consumption was 104.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:35,988 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 75.5 MB. Free memory was 35.8 MB in the beginning and 35.8 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:49:35,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 444.82 ms. Allocated memory is still 98.6 MB. Free memory was 68.0 MB in the beginning and 75.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:35,990 INFO L168 Benchmark]: Boogie Preprocessor took 80.72 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 73.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:35,990 INFO L168 Benchmark]: RCFGBuilder took 673.48 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 52.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:35,991 INFO L168 Benchmark]: TraceAbstraction took 68682.78 ms. Allocated memory was 98.6 MB in the beginning and 232.8 MB in the end (delta: 134.2 MB). Free memory was 52.3 MB in the beginning and 102.5 MB in the end (delta: -50.2 MB). Peak memory consumption was 86.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:35,991 INFO L168 Benchmark]: Witness Printer took 94.16 ms. Allocated memory is still 232.8 MB. Free memory was 102.5 MB in the beginning and 98.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:49:35,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 75.5 MB. Free memory was 35.8 MB in the beginning and 35.8 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 444.82 ms. Allocated memory is still 98.6 MB. Free memory was 68.0 MB in the beginning and 75.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 80.72 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 73.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 673.48 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 52.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 68682.78 ms. Allocated memory was 98.6 MB in the beginning and 232.8 MB in the end (delta: 134.2 MB). Free memory was 52.3 MB in the beginning and 102.5 MB in the end (delta: -50.2 MB). Peak memory consumption was 86.2 MB. Max. memory is 16.1 GB. * Witness Printer took 94.16 ms. Allocated memory is still 232.8 MB. Free memory was 102.5 MB in the beginning and 98.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 66 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 68.6s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 48.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 735 SDtfs, 3059 SDslu, 1450 SDs, 0 SdLazy, 9585 SolverSat, 1936 SolverUnsat, 40 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 986 GetRequests, 516 SyntacticMatches, 22 SemanticMatches, 448 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 45.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=15, 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, 18 MinimizatonAttempts, 274 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 16.3s InterpolantComputationTime, 1110 NumberOfCodeBlocks, 1110 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1083 ConstructedInterpolants, 62 QuantifiedInterpolants, 284585 SizeOfPredicates, 76 NumberOfNonLiveVariables, 2158 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 27 InterpolantComputations, 10 PerfectInterpolantSequences, 168/272 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...