./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:52:14,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:52:14,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:52:14,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:52:14,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:52:14,986 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:52:14,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:52:14,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:52:14,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:52:14,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:52:14,994 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:52:14,996 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:52:14,996 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:52:14,998 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:52:14,999 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:52:14,999 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:52:15,000 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:52:15,001 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:52:15,001 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:52:15,002 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:52:15,002 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:52:15,003 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:52:15,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:52:15,005 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:52:15,006 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:52:15,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:52:15,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:52:15,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:52:15,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:52:15,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:52:15,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:52:15,010 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:52:15,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:52:15,010 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:52:15,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:52:15,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:52:15,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:52:15,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:52:15,012 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:52:15,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:52:15,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:52:15,013 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:52:15,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:52:15,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:52:15,014 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:52:15,014 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:52:15,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:52:15,014 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5097186312a07da16ab8fdeadf6c0d6b4634620407ae37986153d9e0823e6f5 [2023-11-24 23:52:15,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:52:15,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:52:15,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:52:15,351 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:52:15,352 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:52:15,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i [2023-11-24 23:52:18,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:52:18,766 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:52:18,767 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i [2023-11-24 23:52:18,777 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/data/44b7079b1/e0a992ad2021416b828657f63c83c59b/FLAG546e88440 [2023-11-24 23:52:18,797 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/data/44b7079b1/e0a992ad2021416b828657f63c83c59b [2023-11-24 23:52:18,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:52:18,806 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:52:18,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:52:18,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:52:18,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:52:18,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:52:18" (1/1) ... [2023-11-24 23:52:18,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14455f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:18, skipping insertion in model container [2023-11-24 23:52:18,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:52:18" (1/1) ... [2023-11-24 23:52:18,848 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:52:19,030 WARN L240 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_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i[893,906] [2023-11-24 23:52:19,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:52:19,075 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:52:19,088 WARN L240 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_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i[893,906] [2023-11-24 23:52:19,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:52:19,135 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:52:19,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19 WrapperNode [2023-11-24 23:52:19,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:52:19,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:52:19,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:52:19,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:52:19,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,180 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2023-11-24 23:52:19,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:52:19,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:52:19,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:52:19,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:52:19,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:52:19,212 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:52:19,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:52:19,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:52:19,214 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (1/1) ... [2023-11-24 23:52:19,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:52:19,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:52:19,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:52:19,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:52:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:52:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:52:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:52:19,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:52:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:52:19,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:52:19,379 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:52:19,381 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:52:19,586 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:52:19,617 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:52:19,617 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:52:19,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:52:19 BoogieIcfgContainer [2023-11-24 23:52:19,619 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:52:19,623 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:52:19,623 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:52:19,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:52:19,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:52:18" (1/3) ... [2023-11-24 23:52:19,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36392765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:52:19, skipping insertion in model container [2023-11-24 23:52:19,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:19" (2/3) ... [2023-11-24 23:52:19,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36392765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:52:19, skipping insertion in model container [2023-11-24 23:52:19,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:52:19" (3/3) ... [2023-11-24 23:52:19,630 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2023-11-24 23:52:19,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:52:19,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:52:19,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:52:19,708 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=LoopHeads, 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;@28350c9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:52:19,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:52:19,713 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) [2023-11-24 23:52:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:52:19,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:19,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:19,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:19,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash 644946439, now seen corresponding path program 1 times [2023-11-24 23:52:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:19,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109708377] [2023-11-24 23:52:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:20,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:20,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109708377] [2023-11-24 23:52:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109708377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:20,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:52:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115854042] [2023-11-24 23:52:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:20,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:52:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:52:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:52:20,143 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) [2023-11-24 23:52:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:20,457 INFO L93 Difference]: Finished difference Result 102 states and 192 transitions. [2023-11-24 23:52:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:52:20,459 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 [2023-11-24 23:52:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:20,469 INFO L225 Difference]: With dead ends: 102 [2023-11-24 23:52:20,469 INFO L226 Difference]: Without dead ends: 59 [2023-11-24 23:52:20,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:52:20,477 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:20,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 221 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:52:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-24 23:52:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2023-11-24 23:52:20,535 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) [2023-11-24 23:52:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2023-11-24 23:52:20,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 12 [2023-11-24 23:52:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:20,540 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2023-11-24 23:52:20,541 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) [2023-11-24 23:52:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2023-11-24 23:52:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 23:52:20,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:20,543 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:52:20,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:20,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1160344907, now seen corresponding path program 1 times [2023-11-24 23:52:20,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:20,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139537550] [2023-11-24 23:52:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:20,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:20,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139537550] [2023-11-24 23:52:20,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139537550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:20,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:20,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:52:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359456516] [2023-11-24 23:52:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:52:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:52:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:52:20,766 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) [2023-11-24 23:52:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:20,960 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-11-24 23:52:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:52:20,961 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 [2023-11-24 23:52:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:20,967 INFO L225 Difference]: With dead ends: 58 [2023-11-24 23:52:20,967 INFO L226 Difference]: Without dead ends: 56 [2023-11-24 23:52:20,973 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 [2023-11-24 23:52:20,976 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 31 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:20,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:52:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-24 23:52:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-24 23:52:21,009 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) [2023-11-24 23:52:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2023-11-24 23:52:21,012 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 17 [2023-11-24 23:52:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:21,012 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2023-11-24 23:52:21,013 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) [2023-11-24 23:52:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2023-11-24 23:52:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-24 23:52:21,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:21,015 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] [2023-11-24 23:52:21,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:52:21,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:21,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash -695489603, now seen corresponding path program 1 times [2023-11-24 23:52:21,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:21,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270819275] [2023-11-24 23:52:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:21,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-24 23:52:21,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:21,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270819275] [2023-11-24 23:52:21,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270819275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:21,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:21,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:52:21,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946227419] [2023-11-24 23:52:21,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:21,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:52:21,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:52:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:52:21,100 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) [2023-11-24 23:52:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:21,134 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2023-11-24 23:52:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:52:21,135 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 [2023-11-24 23:52:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:21,137 INFO L225 Difference]: With dead ends: 85 [2023-11-24 23:52:21,137 INFO L226 Difference]: Without dead ends: 56 [2023-11-24 23:52:21,138 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 [2023-11-24 23:52:21,139 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:21,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:52:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-24 23:52:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-24 23:52:21,154 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) [2023-11-24 23:52:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2023-11-24 23:52:21,156 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 46 [2023-11-24 23:52:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:21,156 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2023-11-24 23:52:21,157 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) [2023-11-24 23:52:21,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2023-11-24 23:52:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 23:52:21,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:21,159 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] [2023-11-24 23:52:21,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:52:21,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:21,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1294632752, now seen corresponding path program 1 times [2023-11-24 23:52:21,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:21,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070303221] [2023-11-24 23:52:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-24 23:52:21,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070303221] [2023-11-24 23:52:21,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070303221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:21,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:21,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:52:21,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121801201] [2023-11-24 23:52:21,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:21,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:52:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:21,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:52:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:52:21,387 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) [2023-11-24 23:52:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:21,535 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2023-11-24 23:52:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:52:21,536 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 [2023-11-24 23:52:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:21,540 INFO L225 Difference]: With dead ends: 63 [2023-11-24 23:52:21,540 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 23:52:21,541 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 [2023-11-24 23:52:21,552 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:21,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 146 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:52:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 23:52:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-24 23:52:21,574 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) [2023-11-24 23:52:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-24 23:52:21,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 47 [2023-11-24 23:52:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:21,577 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-24 23:52:21,577 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) [2023-11-24 23:52:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-24 23:52:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-24 23:52:21,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:21,582 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] [2023-11-24 23:52:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:52:21,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 939016302, now seen corresponding path program 1 times [2023-11-24 23:52:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114746210] [2023-11-24 23:52:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-24 23:52:21,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:21,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114746210] [2023-11-24 23:52:21,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114746210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:21,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:52:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577047153] [2023-11-24 23:52:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:52:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:52:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:52:21,782 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) [2023-11-24 23:52:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:21,871 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2023-11-24 23:52:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:52:21,872 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 [2023-11-24 23:52:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:21,874 INFO L225 Difference]: With dead ends: 69 [2023-11-24 23:52:21,874 INFO L226 Difference]: Without dead ends: 67 [2023-11-24 23:52:21,875 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 [2023-11-24 23:52:21,876 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:21,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 208 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:52:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-24 23:52:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2023-11-24 23:52:21,892 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) [2023-11-24 23:52:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2023-11-24 23:52:21,894 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 82 [2023-11-24 23:52:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:21,895 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2023-11-24 23:52:21,895 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) [2023-11-24 23:52:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2023-11-24 23:52:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 23:52:21,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:21,898 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] [2023-11-24 23:52:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:52:21,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 254908718, now seen corresponding path program 1 times [2023-11-24 23:52:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789746402] [2023-11-24 23:52:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-24 23:52:22,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789746402] [2023-11-24 23:52:22,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789746402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:22,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:22,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:52:22,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083784497] [2023-11-24 23:52:22,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:22,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:52:22,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:52:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:52:22,064 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) [2023-11-24 23:52:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:22,189 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2023-11-24 23:52:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:52:22,190 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 [2023-11-24 23:52:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:22,191 INFO L225 Difference]: With dead ends: 70 [2023-11-24 23:52:22,191 INFO L226 Difference]: Without dead ends: 0 [2023-11-24 23:52:22,193 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 [2023-11-24 23:52:22,193 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 10 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 273 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:52:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-24 23:52:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-24 23:52:22,195 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) [2023-11-24 23:52:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-24 23:52:22,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 87 [2023-11-24 23:52:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:22,196 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-24 23:52:22,197 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) [2023-11-24 23:52:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-24 23:52:22,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-24 23:52:22,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 23:52:22,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:52:22,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-24 23:52:22,710 INFO L899 garLoopResultBuilder]: For program point L44(lines 44 80) no Hoare annotation was computed. [2023-11-24 23:52:22,710 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 24 83) no Hoare annotation was computed. [2023-11-24 23:52:22,710 INFO L899 garLoopResultBuilder]: For program point L69(lines 69 75) no Hoare annotation was computed. [2023-11-24 23:52:22,710 INFO L899 garLoopResultBuilder]: For program point L36(lines 25 83) no Hoare annotation was computed. [2023-11-24 23:52:22,710 INFO L899 garLoopResultBuilder]: For program point L69-1(lines 69 75) no Hoare annotation was computed. [2023-11-24 23:52:22,710 INFO L899 garLoopResultBuilder]: For program point L61(lines 61 79) no Hoare annotation was computed. [2023-11-24 23:52:22,711 INFO L895 garLoopResultBuilder]: At program point L53(line 53) 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|)) [2023-11-24 23:52:22,711 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|)) [2023-11-24 23:52:22,712 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|)) [2023-11-24 23:52:22,712 INFO L899 garLoopResultBuilder]: For program point L37(lines 25 83) no Hoare annotation was computed. [2023-11-24 23:52:22,712 INFO L899 garLoopResultBuilder]: For program point L54(lines 44 80) no Hoare annotation was computed. [2023-11-24 23:52:22,712 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-24 23:52:22,712 INFO L895 garLoopResultBuilder]: At program point L71(line 71) 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_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,713 INFO L895 garLoopResultBuilder]: At program point L71-1(line 71) 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_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,713 INFO L895 garLoopResultBuilder]: At program point L63(line 63) the Hoare annotation is: (let ((.cse0 (+ |ULTIMATE.start_main_~cp~0#1| 1))) (and (= |ULTIMATE.start_main_~c~0#1| 0) (<= .cse0 |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,713 INFO L895 garLoopResultBuilder]: At program point L63-1(line 63) the Hoare annotation is: (let ((.cse0 (+ |ULTIMATE.start_main_~cp~0#1| 1))) (and (= |ULTIMATE.start_main_~c~0#1| 0) (<= .cse0 |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,713 INFO L895 garLoopResultBuilder]: At program point L47-1(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|)) [2023-11-24 23:52:22,714 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|)) [2023-11-24 23:52:22,714 INFO L895 garLoopResultBuilder]: At program point L72(line 72) 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_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,714 INFO L895 garLoopResultBuilder]: At program point L56(line 56) 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|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,715 INFO L895 garLoopResultBuilder]: At program point L56-1(line 56) 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|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,715 INFO L899 garLoopResultBuilder]: For program point L81(lines 25 83) no Hoare annotation was computed. [2023-11-24 23:52:22,715 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2023-11-24 23:52:22,715 INFO L895 garLoopResultBuilder]: At program point L73(line 73) 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_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,715 INFO L899 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2023-11-24 23:52:22,716 INFO L895 garLoopResultBuilder]: At program point L65-1(lines 65 77) the Hoare annotation is: (let ((.cse0 (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~scheme~0#1|))) (or (and (= |ULTIMATE.start_main_~c~0#1| 0) .cse0 .cse1 .cse2) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2))) [2023-11-24 23:52:22,716 INFO L899 garLoopResultBuilder]: For program point L57(lines 44 80) no Hoare annotation was computed. [2023-11-24 23:52:22,716 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|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,716 INFO L895 garLoopResultBuilder]: At program point L49-1(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|) (<= 0 |ULTIMATE.start_main_~scheme~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)))) [2023-11-24 23:52:22,717 INFO L899 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2023-11-24 23:52:22,717 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-24 23:52:22,717 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2023-11-24 23:52:22,717 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|)) [2023-11-24 23:52:22,717 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|)) [2023-11-24 23:52:22,718 INFO L895 garLoopResultBuilder]: At program point L67(line 67) the Hoare annotation is: (let ((.cse4 (+ |ULTIMATE.start_main_~cp~0#1| 1))) (let ((.cse0 (<= .cse4 |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~scheme~0#1|)) (.cse3 (not (= .cse4 |ULTIMATE.start_main_~urilen~0#1|)))) (or (and (= |ULTIMATE.start_main_~c~0#1| 0) .cse0 (<= 2 |ULTIMATE.start_main_~tokenlen~0#1|) .cse1 .cse2 .cse3) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 (<= (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~tokenlen~0#1|) .cse3)))) [2023-11-24 23:52:22,718 INFO L899 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2023-11-24 23:52:22,718 INFO L895 garLoopResultBuilder]: At program point L67-1(line 67) the Hoare annotation is: (let ((.cse4 (+ |ULTIMATE.start_main_~cp~0#1| 1))) (let ((.cse0 (<= .cse4 |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~scheme~0#1|)) (.cse3 (not (= .cse4 |ULTIMATE.start_main_~urilen~0#1|)))) (or (and (= |ULTIMATE.start_main_~c~0#1| 0) .cse0 (<= 2 |ULTIMATE.start_main_~tokenlen~0#1|) .cse1 .cse2 .cse3) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 (<= (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~tokenlen~0#1|) .cse3)))) [2023-11-24 23:52:22,718 INFO L899 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2023-11-24 23:52:22,719 INFO L899 garLoopResultBuilder]: For program point L68(line 68) no Hoare annotation was computed. [2023-11-24 23:52:22,723 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-11-24 23:52:22,724 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 25 83) no Hoare annotation was computed. [2023-11-24 23:52:22,724 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2023-11-24 23:52:22,724 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2023-11-24 23:52:22,724 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 22) the Hoare annotation is: true [2023-11-24 23:52:22,725 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-11-24 23:52:22,725 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-11-24 23:52:22,725 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-11-24 23:52:22,730 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-24 23:52:22,733 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:52:22,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:52:22 BoogieIcfgContainer [2023-11-24 23:52:22,755 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:52:22,756 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:52:22,756 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:52:22,756 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:52:22,757 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:52:19" (3/4) ... [2023-11-24 23:52:22,760 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 23:52:22,766 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-24 23:52:22,778 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-24 23:52:22,779 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-24 23:52:22,780 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-24 23:52:22,780 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-24 23:52:22,941 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-24 23:52:22,941 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/witness.yml [2023-11-24 23:52:22,941 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:52:22,942 INFO L158 Benchmark]: Toolchain (without parser) took 4136.76ms. Allocated memory is still 165.7MB. Free memory was 119.6MB in the beginning and 110.0MB in the end (delta: 9.6MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,943 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:52:22,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.98ms. Allocated memory is still 165.7MB. Free memory was 119.6MB in the beginning and 108.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.42ms. Allocated memory is still 165.7MB. Free memory was 108.2MB in the beginning and 106.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,944 INFO L158 Benchmark]: Boogie Preprocessor took 29.96ms. Allocated memory is still 165.7MB. Free memory was 106.4MB in the beginning and 105.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,945 INFO L158 Benchmark]: RCFGBuilder took 407.32ms. Allocated memory is still 165.7MB. Free memory was 105.0MB in the beginning and 90.9MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,945 INFO L158 Benchmark]: TraceAbstraction took 3132.49ms. Allocated memory is still 165.7MB. Free memory was 90.3MB in the beginning and 116.3MB in the end (delta: -26.0MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,946 INFO L158 Benchmark]: Witness Printer took 185.94ms. Allocated memory is still 165.7MB. Free memory was 116.3MB in the beginning and 110.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-24 23:52:22,950 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.98ms. Allocated memory is still 165.7MB. Free memory was 119.6MB in the beginning and 108.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.42ms. Allocated memory is still 165.7MB. Free memory was 108.2MB in the beginning and 106.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.96ms. Allocated memory is still 165.7MB. Free memory was 106.4MB in the beginning and 105.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 407.32ms. Allocated memory is still 165.7MB. Free memory was 105.0MB in the beginning and 90.9MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 3132.49ms. Allocated memory is still 165.7MB. Free memory was 90.3MB in the beginning and 116.3MB in the end (delta: -26.0MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. * Witness Printer took 185.94ms. Allocated memory is still 165.7MB. Free memory was 116.3MB in the beginning and 110.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. 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]: a call to reach_error is unreachable For all program executions holds that a 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: 3.0s, OverallIterations: 6, TraceHistogramMax: 14, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 117 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 1144 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 796 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 347 IncrementalHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 348 mSDtfsCounter, 347 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, 0.2s 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, 21 LocationsWithAnnotation, 71 PreInvPairs, 96 NumberOfFragments, 436 HoareAnnotationTreeSize, 71 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 21 FomulaSimplificationsInter, 222 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 446 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: 47]: Loop Invariant Derived loop invariant: ((((cp + 1) <= urilen) && (1 <= cp)) && (0 <= scheme)) - InvariantResult [Line: 65]: Loop Invariant Derived loop invariant: (((((c == 0) && ((cp + 1) <= urilen)) && (1 <= cp)) && (0 <= scheme)) || (((((cp + 1) <= urilen) && (1 <= c)) && (1 <= cp)) && (0 <= scheme))) RESULT: Ultimate proved your program to be correct! [2023-11-24 23:52:22,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4f945f2-b8d9-4ff5-ab07-522bd6950ea8/bin/utaipan-verify-SwPr7d2a91/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