./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd8964853d628053ec141f0834bb54931510ac76 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:42:09,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:42:09,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:42:09,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:42:09,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:42:09,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:42:09,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:42:09,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:42:09,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:42:09,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:42:09,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:42:09,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:42:09,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:42:09,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:42:09,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:42:09,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:42:09,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:42:09,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:42:09,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:42:09,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:42:09,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:42:09,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:42:09,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:42:09,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:42:09,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:42:09,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:42:09,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:42:09,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:42:09,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:42:09,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:42:09,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:42:09,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:42:09,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:42:09,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:42:09,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:42:09,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:42:09,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:42:09,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:42:09,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:42:09,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:42:09,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:42:09,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:42:09,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:42:09,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:42:09,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:42:09,609 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:42:09,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:42:09,610 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:42:09,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:42:09,611 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:42:09,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:42:09,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:42:09,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:42:09,611 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:42:09,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:42:09,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:42:09,612 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:42:09,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:42:09,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:42:09,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:42:09,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:42:09,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:42:09,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:42:09,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:42:09,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:42:09,615 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:42:09,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:42:09,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:42:09,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:42:09,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:42:09,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:42:09,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:42:09,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:42:09,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:09,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:42:09,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:42:09,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:42:09,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:42:09,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:42:09,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:42:09,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:42:09,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:42:09,620 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd8964853d628053ec141f0834bb54931510ac76 [2020-11-28 07:42:09,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:42:09,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:42:09,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:42:09,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:42:09,984 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:42:09,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/../../sv-benchmarks/c/array-fpi/brs2f.c [2020-11-28 07:42:10,088 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/data/7dd43c7da/8c75001fc75a43a19aeb5dad0db2954c/FLAG5e8ed79dc [2020-11-28 07:42:10,737 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:42:10,738 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/sv-benchmarks/c/array-fpi/brs2f.c [2020-11-28 07:42:10,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/data/7dd43c7da/8c75001fc75a43a19aeb5dad0db2954c/FLAG5e8ed79dc [2020-11-28 07:42:11,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/data/7dd43c7da/8c75001fc75a43a19aeb5dad0db2954c [2020-11-28 07:42:11,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:42:11,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:42:11,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:11,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:42:11,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:42:11,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f831c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11, skipping insertion in model container [2020-11-28 07:42:11,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:42:11,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:42:11,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:11,430 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:42:11,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:11,489 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:42:11,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11 WrapperNode [2020-11-28 07:42:11,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:11,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:11,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:42:11,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:42:11,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:11,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:42:11,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:42:11,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:42:11,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... [2020-11-28 07:42:11,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:42:11,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:42:11,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:42:11,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:42:11,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:42:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:42:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:42:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:42:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:42:11,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:42:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:42:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:42:12,370 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:42:12,370 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:42:12,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:12 BoogieIcfgContainer [2020-11-28 07:42:12,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:42:12,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:42:12,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:42:12,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:42:12,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:42:11" (1/3) ... [2020-11-28 07:42:12,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c52ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:12, skipping insertion in model container [2020-11-28 07:42:12,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:11" (2/3) ... [2020-11-28 07:42:12,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c52ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:12, skipping insertion in model container [2020-11-28 07:42:12,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:12" (3/3) ... [2020-11-28 07:42:12,382 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-11-28 07:42:12,395 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:42:12,399 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:42:12,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:42:12,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:42:12,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:42:12,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:42:12,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:42:12,444 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:42:12,445 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:42:12,445 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:42:12,445 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:42:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-28 07:42:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:42:12,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:12,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:42:12,463 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:12,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1381571987, now seen corresponding path program 1 times [2020-11-28 07:42:12,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:12,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372045329] [2020-11-28 07:42:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:12,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372045329] [2020-11-28 07:42:12,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:12,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:42:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508068445] [2020-11-28 07:42:12,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:12,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:12,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:12,693 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-11-28 07:42:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:12,740 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-11-28 07:42:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:12,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:42:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:12,759 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:42:12,759 INFO L226 Difference]: Without dead ends: 8 [2020-11-28 07:42:12,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-28 07:42:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 07:42:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 07:42:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-28 07:42:12,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-11-28 07:42:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:12,807 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-28 07:42:12,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-11-28 07:42:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:42:12,809 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:12,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:12,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:42:12,809 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash 119262491, now seen corresponding path program 1 times [2020-11-28 07:42:12,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:12,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913420478] [2020-11-28 07:42:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:42:12,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913420478] [2020-11-28 07:42:12,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:12,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459752264] [2020-11-28 07:42:12,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:12,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:12,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:12,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:12,924 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-11-28 07:42:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:12,951 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-28 07:42:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:12,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:42:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:12,952 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:42:12,952 INFO L226 Difference]: Without dead ends: 9 [2020-11-28 07:42:12,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-28 07:42:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-28 07:42:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 07:42:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-28 07:42:12,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-11-28 07:42:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:12,957 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 07:42:12,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-28 07:42:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:42:12,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:12,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:12,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:42:12,958 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash -597870442, now seen corresponding path program 1 times [2020-11-28 07:42:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:12,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909088974] [2020-11-28 07:42:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:42:13,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909088974] [2020-11-28 07:42:13,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736008758] [2020-11-28 07:42:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:13,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:42:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:13,225 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 11 treesize of output 7 [2020-11-28 07:42:13,226 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:42:13,237 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:42:13,238 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:42:13,238 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-11-28 07:42:13,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:42:13,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:42:13,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:42:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:42:13,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:13,429 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:42:13,442 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:42:13,500 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:42:13,566 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:42:13,567 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2020-11-28 07:42:13,569 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:42:13,590 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:42:13,605 INFO L625 ElimStorePlain]: treesize reduction 5, result has 64.3 percent of original size [2020-11-28 07:42:13,605 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:42:13,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:9 [2020-11-28 07:42:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:42:13,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218324858] [2020-11-28 07:42:13,674 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:42:13,675 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:42:13,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:42:13,688 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:42:13,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:13,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:14,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:14,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:14,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:14,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:14,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:14,990 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:15,325 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-11-28 07:42:15,544 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-28 07:42:15,792 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-11-28 07:42:16,121 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-28 07:42:16,124 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:16,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:16,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-11-28 07:42:16,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621374795] [2020-11-28 07:42:16,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:42:16,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:16,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:42:16,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:42:16,126 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 10 states. [2020-11-28 07:42:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:16,193 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-28 07:42:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:42:16,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2020-11-28 07:42:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:16,194 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:42:16,194 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:42:16,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:42:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:42:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 07:42:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:42:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 07:42:16,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2020-11-28 07:42:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:16,198 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 07:42:16,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:42:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-28 07:42:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:42:16,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:16,199 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:16,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:42:16,400 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1354154885, now seen corresponding path program 2 times [2020-11-28 07:42:16,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:16,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961832949] [2020-11-28 07:42:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:16,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961832949] [2020-11-28 07:42:16,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936792010] [2020-11-28 07:42:16,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:16,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:42:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:42:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:42:16,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:16,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:16,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817844831] [2020-11-28 07:42:16,648 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:42:16,649 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:42:16,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:42:16,652 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:42:16,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:16,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:16,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:16,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:16,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:17,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:17,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:17,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:17,463 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:17,735 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-11-28 07:42:17,903 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-28 07:42:18,081 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-11-28 07:42:18,366 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-28 07:42:18,367 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:18,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:18,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-11-28 07:42:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202898526] [2020-11-28 07:42:18,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:42:18,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:42:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:42:18,369 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2020-11-28 07:42:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:18,437 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-28 07:42:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:42:18,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-11-28 07:42:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:18,439 INFO L225 Difference]: With dead ends: 17 [2020-11-28 07:42:18,439 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:42:18,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:42:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:42:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:42:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:42:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:42:18,442 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-11-28 07:42:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:18,443 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:42:18,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:42:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:42:18,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:42:18,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:18,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:18,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:18,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:18,654 INFO L82 PathProgramCache]: Analyzing trace with hash -603772147, now seen corresponding path program 3 times [2020-11-28 07:42:18,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:18,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430935074] [2020-11-28 07:42:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:19,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430935074] [2020-11-28 07:42:19,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347497007] [2020-11-28 07:42:19,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:19,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:42:19,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:42:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-28 07:42:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:19,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:28,059 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-11-28 07:42:29,222 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_prenex_5 Int)) (<= (div (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) v_prenex_5 0)) c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset 4)) (- 1)) 2) 1)) is different from false [2020-11-28 07:42:29,554 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-11-28 07:42:29,700 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-28 07:42:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-11-28 07:42:29,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676688900] [2020-11-28 07:42:29,790 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:42:29,790 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:42:29,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:42:29,791 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:42:29,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:29,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:30,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:31,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:31,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:31,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:31,447 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:31,755 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-11-28 07:42:32,007 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-28 07:42:32,268 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-11-28 07:42:32,682 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-28 07:42:32,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:32,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:32,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2020-11-28 07:42:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805938001] [2020-11-28 07:42:32,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-28 07:42:32,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-28 07:42:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=522, Unknown=2, NotChecked=46, Total=650 [2020-11-28 07:42:32,692 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 22 states. [2020-11-28 07:42:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:33,212 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-28 07:42:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:42:33,229 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 10 [2020-11-28 07:42:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:33,230 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:42:33,230 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:42:33,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=140, Invalid=792, Unknown=2, NotChecked=58, Total=992 [2020-11-28 07:42:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:42:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:42:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:42:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-28 07:42:33,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-11-28 07:42:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:33,236 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 07:42:33,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-28 07:42:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-28 07:42:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:42:33,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:33,236 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:33,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:33,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1537107740, now seen corresponding path program 4 times [2020-11-28 07:42:33,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:33,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865358263] [2020-11-28 07:42:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865358263] [2020-11-28 07:42:33,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258795643] [2020-11-28 07:42:33,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:42:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30865999] [2020-11-28 07:42:33,730 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:42:33,731 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:42:33,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:42:33,731 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:42:33,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:33,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:33,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:34,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:34,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:34,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:34,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:34,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:34,534 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:34,823 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-11-28 07:42:35,031 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-28 07:42:35,234 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-11-28 07:42:35,550 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-28 07:42:35,551 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:35,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:35,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2020-11-28 07:42:35,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423942678] [2020-11-28 07:42:35,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:42:35,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:42:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:42:35,552 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 13 states. [2020-11-28 07:42:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:35,634 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-28 07:42:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:42:35,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-11-28 07:42:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:35,636 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:42:35,636 INFO L226 Difference]: Without dead ends: 13 [2020-11-28 07:42:35,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:42:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-28 07:42:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-28 07:42:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:42:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-28 07:42:35,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-11-28 07:42:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:35,639 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-28 07:42:35,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:42:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-28 07:42:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:42:35,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:35,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:35,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:35,854 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:35,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1973802250, now seen corresponding path program 5 times [2020-11-28 07:42:35,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:35,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831024129] [2020-11-28 07:42:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:35,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:35,974 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:35,993 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:42:35,993 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:42:35,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2020-11-28 07:42:36,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:42:36 BoogieIcfgContainer [2020-11-28 07:42:36,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:42:36,045 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:42:36,045 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:42:36,046 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:42:36,046 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:12" (3/4) ... [2020-11-28 07:42:36,048 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:42:36,113 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b5dec2ac-4004-423a-8205-a08e7ffa454f/bin/utaipan/witness.graphml [2020-11-28 07:42:36,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:42:36,114 INFO L168 Benchmark]: Toolchain (without parser) took 24958.37 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 69.9 MB in the beginning and 81.7 MB in the end (delta: -11.7 MB). Peak memory consumption was 108.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:36,114 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:36,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.62 ms. Allocated memory is still 104.9 MB. Free memory was 69.8 MB in the beginning and 81.8 MB in the end (delta: -11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:36,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.32 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:36,116 INFO L168 Benchmark]: Boogie Preprocessor took 38.36 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:36,116 INFO L168 Benchmark]: RCFGBuilder took 785.58 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 54.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:36,119 INFO L168 Benchmark]: TraceAbstraction took 23670.35 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 54.1 MB in the beginning and 84.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 90.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:36,120 INFO L168 Benchmark]: Witness Printer took 68.03 ms. Allocated memory is still 224.4 MB. Free memory was 83.7 MB in the beginning and 81.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:36,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.62 ms. Allocated memory is still 104.9 MB. Free memory was 69.8 MB in the beginning and 81.8 MB in the end (delta: -11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.32 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.36 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 785.58 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 54.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23670.35 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 54.1 MB in the beginning and 84.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 90.4 MB. Max. memory is 16.1 GB. * Witness Printer took 68.03 ms. Allocated memory is still 224.4 MB. Free memory was 83.7 MB in the beginning and 81.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=3] [L31] COND TRUE i