./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.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_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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 ca35bd50d888047fd624bd95d9bb19453630de07 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:43:48,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:43:48,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:43:48,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:43:48,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:43:48,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:43:48,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:43:48,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:43:48,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:43:48,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:43:48,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:43:48,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:43:48,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:43:48,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:43:48,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:43:48,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:43:48,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:43:48,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:43:48,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:43:48,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:43:48,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:43:48,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:43:48,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:43:48,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:43:48,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:43:48,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:43:48,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:43:48,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:43:48,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:43:48,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:43:48,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:43:48,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:43:48,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:43:48,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:43:48,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:43:48,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:43:48,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:43:48,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:43:48,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:43:48,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:43:48,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:43:48,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:43:48,681 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:43:48,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:43:48,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:43:48,683 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:43:48,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:43:48,684 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:43:48,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:43:48,684 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:43:48,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:43:48,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:43:48,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:43:48,686 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:43:48,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:43:48,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:43:48,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:43:48,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:43:48,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:43:48,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:43:48,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:43:48,689 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:43:48,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:43:48,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:43:48,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:43:48,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:43:48,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:43:48,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:43:48,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:43:48,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:43:48,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:43:48,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:43:48,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:43:48,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:43:48,693 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_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca35bd50d888047fd624bd95d9bb19453630de07 [2020-11-28 07:43:48,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:43:48,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:43:49,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:43:49,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:43:49,004 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:43:49,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/../../sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c [2020-11-28 07:43:49,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/data/f481eab9f/85c8bd8e8087436ebc024fc25f4dabdb/FLAG4713af1cc [2020-11-28 07:43:49,675 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:43:49,675 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c [2020-11-28 07:43:49,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/data/f481eab9f/85c8bd8e8087436ebc024fc25f4dabdb/FLAG4713af1cc [2020-11-28 07:43:50,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/data/f481eab9f/85c8bd8e8087436ebc024fc25f4dabdb [2020-11-28 07:43:50,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:43:50,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:43:50,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:50,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:43:50,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:43:50,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2dbea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50, skipping insertion in model container [2020-11-28 07:43:50,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:43:50,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:43:50,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:50,427 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:43:50,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:50,495 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:43:50,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50 WrapperNode [2020-11-28 07:43:50,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:50,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:50,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:43:50,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:43:50,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:50,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:43:50,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:43:50,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:43:50,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:43:50,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:43:50,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:43:50,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:43:50,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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 07:43:50,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:43:50,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:43:50,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:43:50,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:43:51,273 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:43:51,274 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:43:51,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:51 BoogieIcfgContainer [2020-11-28 07:43:51,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:43:51,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:43:51,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:43:51,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:43:51,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:43:50" (1/3) ... [2020-11-28 07:43:51,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebef571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:51, skipping insertion in model container [2020-11-28 07:43:51,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (2/3) ... [2020-11-28 07:43:51,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebef571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:51, skipping insertion in model container [2020-11-28 07:43:51,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:51" (3/3) ... [2020-11-28 07:43:51,284 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1a.cil.c [2020-11-28 07:43:51,295 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:43:51,300 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:43:51,312 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:43:51,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:43:51,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:43:51,336 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:43:51,336 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:43:51,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:43:51,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:43:51,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:43:51,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:43:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-28 07:43:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:43:51,353 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:51,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:43:51,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash 6892918, now seen corresponding path program 1 times [2020-11-28 07:43:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:51,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995940631] [2020-11-28 07:43:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:51,515 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 07:43:51,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995940631] [2020-11-28 07:43:51,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:51,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:51,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631867148] [2020-11-28 07:43:51,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:51,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:51,537 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-11-28 07:43:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:51,609 INFO L93 Difference]: Finished difference Result 86 states and 152 transitions. [2020-11-28 07:43:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:51,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:43:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:51,620 INFO L225 Difference]: With dead ends: 86 [2020-11-28 07:43:51,620 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 07:43:51,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:43:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 07:43:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-28 07:43:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 07:43:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 85 transitions. [2020-11-28 07:43:51,660 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 85 transitions. Word has length 4 [2020-11-28 07:43:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:51,660 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 85 transitions. [2020-11-28 07:43:51,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 85 transitions. [2020-11-28 07:43:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:43:51,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:51,661 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-28 07:43:51,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:43:51,662 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash -809115593, now seen corresponding path program 1 times [2020-11-28 07:43:51,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:51,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061331460] [2020-11-28 07:43:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:51,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061331460] [2020-11-28 07:43:51,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321399186] [2020-11-28 07:43:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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 07:43:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:43:51,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:51,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:51,848 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:43:51,848 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:43:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:43:51,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:43:51,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 4 [2020-11-28 07:43:51,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346921339] [2020-11-28 07:43:51,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:51,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:43:51,867 INFO L87 Difference]: Start difference. First operand 51 states and 85 transitions. Second operand 3 states. [2020-11-28 07:43:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:51,940 INFO L93 Difference]: Finished difference Result 125 states and 212 transitions. [2020-11-28 07:43:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:51,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-28 07:43:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:51,942 INFO L225 Difference]: With dead ends: 125 [2020-11-28 07:43:51,942 INFO L226 Difference]: Without dead ends: 99 [2020-11-28 07:43:51,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:43:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-28 07:43:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-11-28 07:43:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-28 07:43:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 165 transitions. [2020-11-28 07:43:51,975 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 165 transitions. Word has length 7 [2020-11-28 07:43:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:51,975 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 165 transitions. [2020-11-28 07:43:51,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 165 transitions. [2020-11-28 07:43:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:43:51,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:51,977 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:52,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:43:52,180 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1336180149, now seen corresponding path program 1 times [2020-11-28 07:43:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:52,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426034391] [2020-11-28 07:43:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:52,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426034391] [2020-11-28 07:43:52,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:52,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:52,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787905145] [2020-11-28 07:43:52,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:52,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:52,251 INFO L87 Difference]: Start difference. First operand 99 states and 165 transitions. Second operand 3 states. [2020-11-28 07:43:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:52,348 INFO L93 Difference]: Finished difference Result 159 states and 263 transitions. [2020-11-28 07:43:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:52,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-28 07:43:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:52,352 INFO L225 Difference]: With dead ends: 159 [2020-11-28 07:43:52,352 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 07:43:52,353 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 07:43:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 07:43:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-11-28 07:43:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-28 07:43:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 174 transitions. [2020-11-28 07:43:52,374 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 174 transitions. Word has length 20 [2020-11-28 07:43:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:52,374 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 174 transitions. [2020-11-28 07:43:52,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 174 transitions. [2020-11-28 07:43:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:43:52,376 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:52,376 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:52,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:43:52,376 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1700449921, now seen corresponding path program 2 times [2020-11-28 07:43:52,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:52,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295879270] [2020-11-28 07:43:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:43:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295879270] [2020-11-28 07:43:52,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:52,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:52,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473205022] [2020-11-28 07:43:52,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:52,422 INFO L87 Difference]: Start difference. First operand 107 states and 174 transitions. Second operand 3 states. [2020-11-28 07:43:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:52,481 INFO L93 Difference]: Finished difference Result 168 states and 271 transitions. [2020-11-28 07:43:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:52,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-28 07:43:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:52,483 INFO L225 Difference]: With dead ends: 168 [2020-11-28 07:43:52,483 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 07:43:52,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:43:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 07:43:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-28 07:43:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 07:43:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 97 transitions. [2020-11-28 07:43:52,492 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 97 transitions. Word has length 20 [2020-11-28 07:43:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:52,492 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 97 transitions. [2020-11-28 07:43:52,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 97 transitions. [2020-11-28 07:43:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 07:43:52,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:52,494 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:52,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:43:52,494 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -160049449, now seen corresponding path program 1 times [2020-11-28 07:43:52,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:52,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065106831] [2020-11-28 07:43:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 07:43:52,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065106831] [2020-11-28 07:43:52,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:52,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:52,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037459967] [2020-11-28 07:43:52,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:52,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:52,569 INFO L87 Difference]: Start difference. First operand 62 states and 97 transitions. Second operand 3 states. [2020-11-28 07:43:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:52,667 INFO L93 Difference]: Finished difference Result 108 states and 173 transitions. [2020-11-28 07:43:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:52,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-28 07:43:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:52,669 INFO L225 Difference]: With dead ends: 108 [2020-11-28 07:43:52,669 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 07:43:52,670 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 07:43:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 07:43:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-11-28 07:43:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-28 07:43:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 110 transitions. [2020-11-28 07:43:52,679 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 110 transitions. Word has length 24 [2020-11-28 07:43:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:52,679 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 110 transitions. [2020-11-28 07:43:52,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 110 transitions. [2020-11-28 07:43:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 07:43:52,681 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:52,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:52,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:43:52,681 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1660912714, now seen corresponding path program 1 times [2020-11-28 07:43:52,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:52,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667311875] [2020-11-28 07:43:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:52,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667311875] [2020-11-28 07:43:52,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021484564] [2020-11-28 07:43:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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 07:43:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:43:52,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:52,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:52,910 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:43:52,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:43:52,942 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:43:52,943 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:43:52,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:43:52,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:43:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:43:52,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:43:52,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 7 [2020-11-28 07:43:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757288104] [2020-11-28 07:43:52,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:43:52,975 INFO L87 Difference]: Start difference. First operand 75 states and 110 transitions. Second operand 3 states. [2020-11-28 07:43:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:53,014 INFO L93 Difference]: Finished difference Result 120 states and 173 transitions. [2020-11-28 07:43:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:53,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-11-28 07:43:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:53,015 INFO L225 Difference]: With dead ends: 120 [2020-11-28 07:43:53,015 INFO L226 Difference]: Without dead ends: 118 [2020-11-28 07:43:53,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:43:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-28 07:43:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-11-28 07:43:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-28 07:43:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 170 transitions. [2020-11-28 07:43:53,028 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 170 transitions. Word has length 38 [2020-11-28 07:43:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:53,028 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 170 transitions. [2020-11-28 07:43:53,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 170 transitions. [2020-11-28 07:43:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-28 07:43:53,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:53,030 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:53,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:53,243 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1588874347, now seen corresponding path program 1 times [2020-11-28 07:43:53,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:53,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476692998] [2020-11-28 07:43:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:53,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476692998] [2020-11-28 07:43:53,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486227536] [2020-11-28 07:43:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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 07:43:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:43:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:43:53,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:43:53,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:43:53,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2020-11-28 07:43:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159394582] [2020-11-28 07:43:53,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:43:53,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:43:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:43:53,450 INFO L87 Difference]: Start difference. First operand 116 states and 170 transitions. Second operand 4 states. [2020-11-28 07:43:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:53,606 INFO L93 Difference]: Finished difference Result 236 states and 354 transitions. [2020-11-28 07:43:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:43:53,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-11-28 07:43:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:53,608 INFO L225 Difference]: With dead ends: 236 [2020-11-28 07:43:53,629 INFO L226 Difference]: Without dead ends: 124 [2020-11-28 07:43:53,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:43:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-28 07:43:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2020-11-28 07:43:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-28 07:43:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2020-11-28 07:43:53,655 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 40 [2020-11-28 07:43:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:53,656 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2020-11-28 07:43:53,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:43:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2020-11-28 07:43:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-28 07:43:53,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:53,663 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:53,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:53,876 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash -81289654, now seen corresponding path program 1 times [2020-11-28 07:43:53,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:53,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846424547] [2020-11-28 07:43:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:53,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846424547] [2020-11-28 07:43:53,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882224653] [2020-11-28 07:43:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/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 07:43:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:43:54,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:43:54,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:43:54,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:43:54,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2020-11-28 07:43:54,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259335214] [2020-11-28 07:43:54,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:43:54,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:43:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:43:54,053 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand 4 states. [2020-11-28 07:43:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:54,201 INFO L93 Difference]: Finished difference Result 246 states and 291 transitions. [2020-11-28 07:43:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:43:54,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-11-28 07:43:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:54,205 INFO L225 Difference]: With dead ends: 246 [2020-11-28 07:43:54,205 INFO L226 Difference]: Without dead ends: 155 [2020-11-28 07:43:54,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:43:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-28 07:43:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-11-28 07:43:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-28 07:43:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-11-28 07:43:54,229 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 54 [2020-11-28 07:43:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:54,229 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-11-28 07:43:54,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:43:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-11-28 07:43:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-28 07:43:54,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:54,235 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:54,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:54,456 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash -320697252, now seen corresponding path program 1 times [2020-11-28 07:43:54,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:54,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353524299] [2020-11-28 07:43:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 07:43:54,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353524299] [2020-11-28 07:43:54,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903417340] [2020-11-28 07:43:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:43:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 07:43:54,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 07:43:54,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:43:54,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:43:54,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210153320] [2020-11-28 07:43:54,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:54,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:54,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:54,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:43:54,670 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 3 states. [2020-11-28 07:43:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:54,685 INFO L93 Difference]: Finished difference Result 199 states and 228 transitions. [2020-11-28 07:43:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:54,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-28 07:43:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:54,686 INFO L225 Difference]: With dead ends: 199 [2020-11-28 07:43:54,686 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:43:54,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:43:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:43:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:43:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:43:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:43:54,688 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-11-28 07:43:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:54,688 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:43:54,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:43:54,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:43:54,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:54,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:43:55,636 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:43:55,636 INFO L277 CegarLoopResult]: At program point L218(lines 10 219) the Hoare annotation is: true [2020-11-28 07:43:55,636 INFO L270 CegarLoopResult]: At program point L70(lines 70 187) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (and .cse0 (<= ULTIMATE.start_main_~s__state~0 8640)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,637 INFO L270 CegarLoopResult]: At program point L62(lines 62 191) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,637 INFO L274 CegarLoopResult]: For program point L153-1(lines 76 185) no Hoare annotation was computed. [2020-11-28 07:43:55,637 INFO L270 CegarLoopResult]: At program point L54(lines 54 195) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,637 INFO L270 CegarLoopResult]: At program point L178(lines 24 213) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,637 INFO L274 CegarLoopResult]: For program point L46(lines 46 199) no Hoare annotation was computed. [2020-11-28 07:43:55,637 INFO L270 CegarLoopResult]: At program point L38(lines 38 203) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,637 INFO L270 CegarLoopResult]: At program point L47(lines 46 199) the Hoare annotation is: (and (<= ULTIMATE.start_main_~blastFlag~0 2) (< 8512 ULTIMATE.start_main_~s__state~0) (<= ULTIMATE.start_main_~s__state~0 8640)) [2020-11-28 07:43:55,638 INFO L274 CegarLoopResult]: For program point L171-1(lines 76 185) no Hoare annotation was computed. [2020-11-28 07:43:55,638 INFO L270 CegarLoopResult]: At program point L31(lines 31 206) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,638 INFO L270 CegarLoopResult]: At program point L122(lines 115 124) the Hoare annotation is: (and (<= ULTIMATE.start_main_~blastFlag~0 2) (< 8512 ULTIMATE.start_main_~s__state~0) (<= ULTIMATE.start_main_~s__state~0 8640)) [2020-11-28 07:43:55,638 INFO L270 CegarLoopResult]: At program point L114(lines 107 125) the Hoare annotation is: (and (<= ULTIMATE.start_main_~blastFlag~0 2) (< 8512 ULTIMATE.start_main_~s__state~0) (<= ULTIMATE.start_main_~s__state~0 8640)) [2020-11-28 07:43:55,638 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:43:55,638 INFO L274 CegarLoopResult]: For program point L107(lines 107 125) no Hoare annotation was computed. [2020-11-28 07:43:55,638 INFO L274 CegarLoopResult]: For program point L74(lines 74 185) no Hoare annotation was computed. [2020-11-28 07:43:55,639 INFO L270 CegarLoopResult]: At program point L66(lines 66 189) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,639 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:43:55,639 INFO L270 CegarLoopResult]: At program point L58(lines 58 193) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,639 INFO L274 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-11-28 07:43:55,639 INFO L277 CegarLoopResult]: At program point L215(lines 10 219) the Hoare annotation is: true [2020-11-28 07:43:55,639 INFO L274 CegarLoopResult]: For program point L116(lines 116 120) no Hoare annotation was computed. [2020-11-28 07:43:55,639 INFO L270 CegarLoopResult]: At program point L50(lines 50 197) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,639 INFO L274 CegarLoopResult]: For program point L174(lines 174 176) no Hoare annotation was computed. [2020-11-28 07:43:55,639 INFO L274 CegarLoopResult]: For program point L108(lines 108 112) no Hoare annotation was computed. [2020-11-28 07:43:55,641 INFO L270 CegarLoopResult]: At program point L75(lines 74 185) the Hoare annotation is: (and (< ULTIMATE.start_main_~blastFlag~0 5) (<= 8672 ULTIMATE.start_main_~s__state~0)) [2020-11-28 07:43:55,641 INFO L270 CegarLoopResult]: At program point L42(lines 42 201) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,641 INFO L270 CegarLoopResult]: At program point L34(lines 34 205) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (<= ULTIMATE.start_main_~blastFlag~0 2) (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2020-11-28 07:43:55,642 INFO L270 CegarLoopResult]: At program point L175(lines 10 219) the Hoare annotation is: false [2020-11-28 07:43:55,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:43:55 BoogieIcfgContainer [2020-11-28 07:43:55,660 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:43:55,661 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:43:55,661 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:43:55,661 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:43:55,662 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:51" (3/4) ... [2020-11-28 07:43:55,665 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:43:55,675 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-28 07:43:55,676 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:43:55,676 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:43:55,677 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:43:55,749 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4faa94b3-e0ce-4ef9-97cf-fb64fd8e1e92/bin/utaipan/witness.graphml [2020-11-28 07:43:55,749 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:43:55,751 INFO L168 Benchmark]: Toolchain (without parser) took 5671.98 ms. Allocated memory was 96.5 MB in the beginning and 169.9 MB in the end (delta: 73.4 MB). Free memory was 68.7 MB in the beginning and 111.8 MB in the end (delta: -43.1 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,751 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:43:55,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.16 ms. Allocated memory is still 96.5 MB. Free memory was 68.4 MB in the beginning and 72.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.21 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 70.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,753 INFO L168 Benchmark]: Boogie Preprocessor took 21.45 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 69.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,754 INFO L168 Benchmark]: RCFGBuilder took 706.03 ms. Allocated memory was 96.5 MB in the beginning and 140.5 MB in the end (delta: 44.0 MB). Free memory was 69.6 MB in the beginning and 114.9 MB in the end (delta: -45.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,754 INFO L168 Benchmark]: TraceAbstraction took 4383.18 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 114.1 MB in the beginning and 116.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 84.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,754 INFO L168 Benchmark]: Witness Printer took 88.30 ms. Allocated memory is still 169.9 MB. Free memory was 116.0 MB in the beginning and 111.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:55,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.16 ms. Allocated memory is still 96.5 MB. Free memory was 68.4 MB in the beginning and 72.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.21 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 70.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.45 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 69.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 706.03 ms. Allocated memory was 96.5 MB in the beginning and 140.5 MB in the end (delta: 44.0 MB). Free memory was 69.6 MB in the beginning and 114.9 MB in the end (delta: -45.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4383.18 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 114.1 MB in the beginning and 116.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 84.5 MB. Max. memory is 16.1 GB. * Witness Printer took 88.30 ms. Allocated memory is still 169.9 MB. Free memory was 116.0 MB in the beginning and 111.8 MB in the end (delta: 4.2 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: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8512 < s__state) && s__state <= 8640 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 115]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8512 < s__state) && s__state <= 8640 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 70]: Loop Invariant Derived loop invariant: ((8640 <= s__state && s__state <= 8640) || blastFlag <= 2) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 107]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8512 < s__state) && s__state <= 8640 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 62]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 74]: Loop Invariant Derived loop invariant: blastFlag < 5 && 8672 <= s__state - InvariantResult [Line: 54]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 66]: Loop Invariant Derived loop invariant: (blastFlag <= 2 || ((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640)) || (blastFlag < 5 && 8640 <= s__state) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 374 SDtfs, 173 SDslu, 196 SDs, 0 SdLazy, 315 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 18 PreInvPairs, 108 NumberOfFragments, 278 HoareAnnotationTreeSize, 18 FomulaSimplifications, 870 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 456 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 506 NumberOfCodeBlocks, 506 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 706 ConstructedInterpolants, 0 QuantifiedInterpolants, 67142 SizeOfPredicates, 4 NumberOfNonLiveVariables, 512 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 19 InterpolantComputations, 12 PerfectInterpolantSequences, 779/933 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...