./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur --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 b5097186312a07da16ab8fdeadf6c0d6b4634620407ae37986153d9e0823e6f5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:15:22,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:15:22,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:15:22,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:15:22,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:15:22,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:15:22,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:15:22,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:15:22,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:15:22,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:15:22,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:15:22,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:15:22,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:15:22,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:15:22,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:15:22,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:15:22,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:15:22,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:15:22,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:15:22,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:15:22,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:15:22,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:15:22,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:15:22,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:15:22,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:15:22,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:15:22,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:15:22,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:15:22,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:15:22,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:15:22,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:15:22,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:15:22,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:15:22,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:15:22,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:15:22,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:15:22,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:15:22,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:15:22,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:15:22,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:15:22,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:15:22,634 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:15:22,669 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:15:22,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:15:22,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:15:22,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:15:22,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:15:22,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:15:22,672 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:15:22,672 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:15:22,672 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:15:22,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:15:22,674 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:15:22,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:15:22,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:15:22,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:15:22,675 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:15:22,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:15:22,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:15:22,676 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:15:22,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:15:22,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:15:22,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:15:22,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:15:22,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:15:22,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:15:22,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:15:22,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:15:22,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:15:22,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:15:22,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:15:22,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:15:22,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:15:22,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:15:22,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:22,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:15:22,681 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:15:22,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:15:22,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:15:22,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:15:22,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:15:22,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:15:22,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:15:22,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5097186312a07da16ab8fdeadf6c0d6b4634620407ae37986153d9e0823e6f5 [2022-11-25 23:15:22,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:15:23,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:15:23,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:15:23,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:15:23,024 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:15:23,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i [2022-11-25 23:15:26,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:15:26,349 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:15:26,350 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i [2022-11-25 23:15:26,356 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/data/d87e18c12/4d53a4f92cfc4b0286683f6af221e92b/FLAGc6d4caa9e [2022-11-25 23:15:26,378 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/data/d87e18c12/4d53a4f92cfc4b0286683f6af221e92b [2022-11-25 23:15:26,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:15:26,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:15:26,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:26,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:15:26,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:15:26,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568d78d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26, skipping insertion in model container [2022-11-25 23:15:26,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:15:26,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:15:26,565 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i[893,906] [2022-11-25 23:15:26,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:26,595 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:15:26,605 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i[893,906] [2022-11-25 23:15:26,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:26,627 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:15:26,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26 WrapperNode [2022-11-25 23:15:26,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:26,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:26,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:15:26,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:15:26,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,663 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2022-11-25 23:15:26,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:26,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:15:26,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:15:26,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:15:26,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:15:26,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:15:26,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:15:26,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:15:26,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:26,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:26,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:15:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:15:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:15:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:15:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:15:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:15:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:15:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:15:26,852 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:15:26,855 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:15:27,107 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:15:27,136 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:15:27,136 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:15:27,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:27 BoogieIcfgContainer [2022-11-25 23:15:27,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:15:27,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:15:27,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:15:27,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:15:27,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:15:26" (1/3) ... [2022-11-25 23:15:27,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243e1d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:27, skipping insertion in model container [2022-11-25 23:15:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26" (2/3) ... [2022-11-25 23:15:27,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243e1d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:27, skipping insertion in model container [2022-11-25 23:15:27,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:27" (3/3) ... [2022-11-25 23:15:27,155 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2022-11-25 23:15:27,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:15:27,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:15:27,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:15:27,283 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ecd4d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:15:27,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:15:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 30 states have internal predecessors, (43), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 23:15:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:15:27,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:27,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:27,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:27,302 INFO L85 PathProgramCache]: Analyzing trace with hash 515863720, now seen corresponding path program 1 times [2022-11-25 23:15:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:27,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789252439] [2022-11-25 23:15:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:27,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:27,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789252439] [2022-11-25 23:15:27,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789252439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:27,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:27,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:15:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428957065] [2022-11-25 23:15:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:15:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:15:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:15:27,753 INFO L87 Difference]: Start difference. First operand has 47 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 30 states have internal predecessors, (43), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:27,938 INFO L93 Difference]: Finished difference Result 103 states and 192 transitions. [2022-11-25 23:15:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:15:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:15:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:27,950 INFO L225 Difference]: With dead ends: 103 [2022-11-25 23:15:27,950 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 23:15:27,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:15:27,962 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 18 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:27,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 213 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 23:15:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2022-11-25 23:15:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.206896551724138) internal successors, (35), 33 states have internal predecessors, (35), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 23:15:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2022-11-25 23:15:28,015 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 12 [2022-11-25 23:15:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:28,016 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2022-11-25 23:15:28,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:28,017 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2022-11-25 23:15:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:15:28,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:28,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:28,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:15:28,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1781312692, now seen corresponding path program 1 times [2022-11-25 23:15:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:28,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918842465] [2022-11-25 23:15:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:28,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918842465] [2022-11-25 23:15:28,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918842465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:28,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:28,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:15:28,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878862942] [2022-11-25 23:15:28,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:28,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:15:28,232 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:15:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:28,426 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2022-11-25 23:15:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:15:28,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-25 23:15:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:28,430 INFO L225 Difference]: With dead ends: 58 [2022-11-25 23:15:28,430 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 23:15:28,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:15:28,432 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 31 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:28,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 129 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:15:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 23:15:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-25 23:15:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.1875) internal successors, (38), 36 states have internal predecessors, (38), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 23:15:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-25 23:15:28,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 17 [2022-11-25 23:15:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:28,458 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-25 23:15:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:15:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-25 23:15:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:15:28,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:28,460 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:28,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:15:28,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash 487857694, now seen corresponding path program 1 times [2022-11-25 23:15:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439646583] [2022-11-25 23:15:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:15:28,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439646583] [2022-11-25 23:15:28,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439646583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:28,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:28,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:15:28,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473795656] [2022-11-25 23:15:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:28,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:15:28,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:15:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:15:28,518 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:15:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:28,598 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2022-11-25 23:15:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:15:28,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-25 23:15:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:28,605 INFO L225 Difference]: With dead ends: 85 [2022-11-25 23:15:28,605 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 23:15:28,612 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:15:28,615 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:28,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 23:15:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-25 23:15:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.125) internal successors, (36), 36 states have internal predecessors, (36), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 23:15:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-11-25 23:15:28,641 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 46 [2022-11-25 23:15:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:28,642 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-11-25 23:15:28,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:15:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-11-25 23:15:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:15:28,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:28,646 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:28,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:15:28,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1029395087, now seen corresponding path program 1 times [2022-11-25 23:15:28,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:28,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222266279] [2022-11-25 23:15:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:15:28,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222266279] [2022-11-25 23:15:28,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222266279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:28,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:28,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:15:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917704405] [2022-11-25 23:15:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:15:28,841 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:15:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:28,980 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-11-25 23:15:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:15:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-11-25 23:15:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:28,982 INFO L225 Difference]: With dead ends: 63 [2022-11-25 23:15:28,983 INFO L226 Difference]: Without dead ends: 61 [2022-11-25 23:15:28,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:15:28,984 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:28,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 114 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-25 23:15:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-11-25 23:15:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 39 states have internal predecessors, (39), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 23:15:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2022-11-25 23:15:28,999 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 47 [2022-11-25 23:15:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:28,999 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2022-11-25 23:15:29,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:15:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2022-11-25 23:15:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 23:15:29,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:29,003 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:29,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:15:29,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 155637327, now seen corresponding path program 1 times [2022-11-25 23:15:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663103673] [2022-11-25 23:15:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-25 23:15:29,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663103673] [2022-11-25 23:15:29,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663103673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:29,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:29,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:15:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803653907] [2022-11-25 23:15:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:29,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:15:29,220 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 23:15:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:29,304 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2022-11-25 23:15:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:15:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 82 [2022-11-25 23:15:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:29,311 INFO L225 Difference]: With dead ends: 69 [2022-11-25 23:15:29,312 INFO L226 Difference]: Without dead ends: 67 [2022-11-25 23:15:29,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:15:29,318 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 7 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:29,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 251 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-25 23:15:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-25 23:15:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.105263157894737) internal successors, (42), 42 states have internal predecessors, (42), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 23:15:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-11-25 23:15:29,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 82 [2022-11-25 23:15:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:29,352 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-11-25 23:15:29,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 23:15:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-11-25 23:15:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:15:29,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:29,362 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:29,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:15:29,362 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1599436819, now seen corresponding path program 1 times [2022-11-25 23:15:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509677752] [2022-11-25 23:15:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:29,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-25 23:15:29,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509677752] [2022-11-25 23:15:29,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509677752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:29,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:29,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:15:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93009363] [2022-11-25 23:15:29,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:29,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:29,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:15:29,580 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-25 23:15:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:29,681 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2022-11-25 23:15:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:15:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 87 [2022-11-25 23:15:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:29,685 INFO L225 Difference]: With dead ends: 70 [2022-11-25 23:15:29,685 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 23:15:29,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:15:29,689 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 10 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:29,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 267 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 23:15:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 23:15:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 23:15:29,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 87 [2022-11-25 23:15:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:29,694 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 23:15:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-25 23:15:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 23:15:29,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 23:15:29,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 23:15:29,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:15:29,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 23:15:30,084 INFO L899 garLoopResultBuilder]: For program point L44(lines 44 80) no Hoare annotation was computed. [2022-11-25 23:15:30,085 INFO L899 garLoopResultBuilder]: For program point L69(lines 69 75) no Hoare annotation was computed. [2022-11-25 23:15:30,085 INFO L899 garLoopResultBuilder]: For program point L36(lines 25 83) no Hoare annotation was computed. [2022-11-25 23:15:30,085 INFO L899 garLoopResultBuilder]: For program point L69-1(lines 69 75) no Hoare annotation was computed. [2022-11-25 23:15:30,085 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 23:15:30,085 INFO L899 garLoopResultBuilder]: For program point L61(lines 61 79) no Hoare annotation was computed. [2022-11-25 23:15:30,085 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,086 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,086 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,086 INFO L899 garLoopResultBuilder]: For program point L37(lines 25 83) no Hoare annotation was computed. [2022-11-25 23:15:30,086 INFO L899 garLoopResultBuilder]: For program point L54(lines 44 80) no Hoare annotation was computed. [2022-11-25 23:15:30,086 INFO L895 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,086 INFO L895 garLoopResultBuilder]: At program point L71-1(line 71) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,087 INFO L895 garLoopResultBuilder]: At program point L63(line 63) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,087 INFO L895 garLoopResultBuilder]: At program point L63-1(line 63) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,087 INFO L895 garLoopResultBuilder]: At program point L47-1(lines 46 52) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,087 INFO L895 garLoopResultBuilder]: At program point L47-2(lines 47 52) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,087 INFO L895 garLoopResultBuilder]: At program point L72(line 72) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,088 INFO L895 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,088 INFO L895 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,088 INFO L902 garLoopResultBuilder]: At program point L81(lines 25 83) the Hoare annotation is: true [2022-11-25 23:15:30,088 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2022-11-25 23:15:30,088 INFO L895 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,088 INFO L899 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2022-11-25 23:15:30,088 INFO L895 garLoopResultBuilder]: At program point L65-1(lines 64 77) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) .cse1 .cse2) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2))) [2022-11-25 23:15:30,089 INFO L899 garLoopResultBuilder]: For program point L57(lines 44 80) no Hoare annotation was computed. [2022-11-25 23:15:30,089 INFO L902 garLoopResultBuilder]: At program point L82(lines 24 83) the Hoare annotation is: true [2022-11-25 23:15:30,089 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (+ |ULTIMATE.start_main_~cp~0#1| 1))) (and (<= .cse0 |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) [2022-11-25 23:15:30,089 INFO L895 garLoopResultBuilder]: At program point L49-1(line 49) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,089 INFO L899 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-11-25 23:15:30,089 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 23:15:30,089 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-11-25 23:15:30,089 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,090 INFO L895 garLoopResultBuilder]: At program point L42-1(line 42) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2022-11-25 23:15:30,090 INFO L895 garLoopResultBuilder]: At program point L67(line 67) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~tokenlen~0#1|)) (.cse3 (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|))) (.cse4 (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 .cse3 .cse4))) [2022-11-25 23:15:30,090 INFO L899 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2022-11-25 23:15:30,090 INFO L895 garLoopResultBuilder]: At program point L67-1(line 67) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~tokenlen~0#1|)) (.cse3 (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|))) (.cse4 (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 .cse3 .cse4))) [2022-11-25 23:15:30,090 INFO L899 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2022-11-25 23:15:30,090 INFO L899 garLoopResultBuilder]: For program point L68(line 68) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 25 83) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-11-25 23:15:30,091 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-11-25 23:15:30,096 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-25 23:15:30,098 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:15:30,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:15:30 BoogieIcfgContainer [2022-11-25 23:15:30,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:15:30,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:15:30,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:15:30,113 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:15:30,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:27" (3/4) ... [2022-11-25 23:15:30,116 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 23:15:30,122 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 23:15:30,126 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-25 23:15:30,127 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 23:15:30,138 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 23:15:30,139 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 23:15:30,210 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 23:15:30,211 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:15:30,211 INFO L158 Benchmark]: Toolchain (without parser) took 3828.32ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 68.5MB in the beginning and 114.7MB in the end (delta: -46.2MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. [2022-11-25 23:15:30,212 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory was 67.2MB in the beginning and 67.1MB in the end (delta: 66.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:15:30,212 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.36ms. Allocated memory is still 113.2MB. Free memory was 68.2MB in the beginning and 57.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:15:30,212 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.85ms. Allocated memory is still 113.2MB. Free memory was 57.3MB in the beginning and 55.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:15:30,213 INFO L158 Benchmark]: Boogie Preprocessor took 25.24ms. Allocated memory is still 113.2MB. Free memory was 55.3MB in the beginning and 54.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:15:30,216 INFO L158 Benchmark]: RCFGBuilder took 449.36ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 54.1MB in the beginning and 112.7MB in the end (delta: -58.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2022-11-25 23:15:30,216 INFO L158 Benchmark]: TraceAbstraction took 2970.20ms. Allocated memory is still 146.8MB. Free memory was 112.2MB in the beginning and 43.6MB in the end (delta: 68.6MB). Peak memory consumption was 68.6MB. Max. memory is 16.1GB. [2022-11-25 23:15:30,217 INFO L158 Benchmark]: Witness Printer took 98.38ms. Allocated memory is still 146.8MB. Free memory was 43.6MB in the beginning and 114.7MB in the end (delta: -71.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:15:30,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory was 67.2MB in the beginning and 67.1MB in the end (delta: 66.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 242.36ms. Allocated memory is still 113.2MB. Free memory was 68.2MB in the beginning and 57.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.85ms. Allocated memory is still 113.2MB. Free memory was 57.3MB in the beginning and 55.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.24ms. Allocated memory is still 113.2MB. Free memory was 55.3MB in the beginning and 54.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 449.36ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 54.1MB in the beginning and 112.7MB in the end (delta: -58.6MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * TraceAbstraction took 2970.20ms. Allocated memory is still 146.8MB. Free memory was 112.2MB in the beginning and 43.6MB in the end (delta: 68.6MB). Peak memory consumption was 68.6MB. Max. memory is 16.1GB. * Witness Printer took 98.38ms. Allocated memory is still 146.8MB. Free memory was 43.6MB in the beginning and 114.7MB in the end (delta: -71.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 14, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 116 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 1075 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 722 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 486 IncrementalHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 353 mSDtfsCounter, 486 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=5, InterpolantAutomatonStates: 37, 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, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 73 PreInvPairs, 104 NumberOfFragments, 456 HoareAnnotationTreeSize, 73 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 280 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 436 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (cp + 1 <= urilen && 1 <= cp) && 0 < scheme + 1 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (((cp < urilen && c == 0) && 1 <= cp) && 0 < scheme + 1) || (((cp < urilen && 1 <= c) && 1 <= cp) && 0 < scheme + 1) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-25 23:15:30,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_846b3bf4-6109-4116-941f-3583c28ac908/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE