./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/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_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/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_1fe3c02c-e020-4b2c-8990-b83c21d9b960/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 80f9a5324ebd6f7f9b0f4370bb23b9787fd1aa3c807ea310f755bbaf1b53f47a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:56,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:56,883 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:06:56,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:56,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:56,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:56,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:56,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:56,926 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:56,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:56,928 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:56,929 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:56,929 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:56,930 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:56,931 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:56,932 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:56,932 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:56,933 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:56,934 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:56,935 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:56,936 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:56,936 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:56,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:56,938 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:56,939 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:06:56,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:56,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:06:56,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:56,941 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:56,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:56,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:56,943 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:06:56,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:56,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:56,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:56,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:56,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:56,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:56,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:56,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:56,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:56,949 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:56,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:56,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:56,950 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:56,951 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:56,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:56,952 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_1fe3c02c-e020-4b2c-8990-b83c21d9b960/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80f9a5324ebd6f7f9b0f4370bb23b9787fd1aa3c807ea310f755bbaf1b53f47a [2023-11-25 00:06:57,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:57,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:57,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:57,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:57,342 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:57,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-11-25 00:07:01,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:07:01,339 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:07:01,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-11-25 00:07:01,373 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/data/cc5245d3a/5ba9cccdd4e3428eb5b17a6488c3baed/FLAGcc825ae83 [2023-11-25 00:07:01,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/data/cc5245d3a/5ba9cccdd4e3428eb5b17a6488c3baed [2023-11-25 00:07:01,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:07:01,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:07:01,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:01,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:07:01,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:07:01,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:01" (1/1) ... [2023-11-25 00:07:01,414 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126392d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:01, skipping insertion in model container [2023-11-25 00:07:01,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:01" (1/1) ... [2023-11-25 00:07:01,502 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:07:01,885 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_1fe3c02c-e020-4b2c-8990-b83c21d9b960/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c[30998,31011] [2023-11-25 00:07:01,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:01,906 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:07:02,021 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_1fe3c02c-e020-4b2c-8990-b83c21d9b960/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c[30998,31011] [2023-11-25 00:07:02,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:02,040 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:07:02,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02 WrapperNode [2023-11-25 00:07:02,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:02,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:02,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:07:02,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:07:02,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,148 INFO L138 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1002 [2023-11-25 00:07:02,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:02,149 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:07:02,149 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:07:02,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:07:02,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,184 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:07:02,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:07:02,268 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:07:02,268 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:07:02,269 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (1/1) ... [2023-11-25 00:07:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:02,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:07:02,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:07:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:07:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:07:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:07:02,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:07:02,527 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:07:02,533 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:07:04,033 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:07:05,462 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:07:05,463 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:07:05,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:07:05 BoogieIcfgContainer [2023-11-25 00:07:05,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:07:05,468 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:07:05,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:07:05,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:07:05,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:07:01" (1/3) ... [2023-11-25 00:07:05,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57605c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:07:05, skipping insertion in model container [2023-11-25 00:07:05,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:02" (2/3) ... [2023-11-25 00:07:05,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57605c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:07:05, skipping insertion in model container [2023-11-25 00:07:05,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:07:05" (3/3) ... [2023-11-25 00:07:05,478 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-11-25 00:07:05,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:07:05,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:07:05,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:07:05,562 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;@3680b26d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:07:05,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:07:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2023-11-25 00:07:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-25 00:07:05,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:05,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:05,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:05,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:05,588 INFO L85 PathProgramCache]: Analyzing trace with hash -43590941, now seen corresponding path program 1 times [2023-11-25 00:07:05,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:05,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899693880] [2023-11-25 00:07:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:05,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:11,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899693880] [2023-11-25 00:07:11,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899693880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:11,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:11,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:11,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741405117] [2023-11-25 00:07:11,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:11,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:11,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:11,775 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-25 00:07:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:12,083 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2023-11-25 00:07:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) Word has length 54 [2023-11-25 00:07:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:12,103 INFO L225 Difference]: With dead ends: 180 [2023-11-25 00:07:12,103 INFO L226 Difference]: Without dead ends: 158 [2023-11-25 00:07:12,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:12,112 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:12,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-25 00:07:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2023-11-25 00:07:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2023-11-25 00:07:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2023-11-25 00:07:12,176 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2023-11-25 00:07:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:12,177 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2023-11-25 00:07:12,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-25 00:07:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2023-11-25 00:07:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:07:12,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:12,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:12,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:07:12,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:12,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1419522780, now seen corresponding path program 1 times [2023-11-25 00:07:12,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:12,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342631446] [2023-11-25 00:07:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:15,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342631446] [2023-11-25 00:07:15,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342631446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:15,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:15,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79784077] [2023-11-25 00:07:15,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:15,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:15,388 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-25 00:07:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:15,605 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2023-11-25 00:07:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) Word has length 55 [2023-11-25 00:07:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:15,609 INFO L225 Difference]: With dead ends: 180 [2023-11-25 00:07:15,609 INFO L226 Difference]: Without dead ends: 160 [2023-11-25 00:07:15,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:15,611 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:15,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-25 00:07:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-25 00:07:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2023-11-25 00:07:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2023-11-25 00:07:15,625 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2023-11-25 00:07:15,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:15,626 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2023-11-25 00:07:15,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-25 00:07:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2023-11-25 00:07:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-25 00:07:15,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:15,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:15,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:07:15,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:15,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1118285076, now seen corresponding path program 1 times [2023-11-25 00:07:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:15,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812564679] [2023-11-25 00:07:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:18,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:18,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812564679] [2023-11-25 00:07:18,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812564679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:18,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:18,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851192693] [2023-11-25 00:07:18,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:18,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:18,045 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2023-11-25 00:07:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:18,235 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2023-11-25 00:07:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) Word has length 56 [2023-11-25 00:07:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:18,237 INFO L225 Difference]: With dead ends: 180 [2023-11-25 00:07:18,238 INFO L226 Difference]: Without dead ends: 160 [2023-11-25 00:07:18,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:18,240 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:18,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 384 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-25 00:07:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-25 00:07:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2023-11-25 00:07:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2023-11-25 00:07:18,266 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2023-11-25 00:07:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:18,271 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2023-11-25 00:07:18,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2023-11-25 00:07:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2023-11-25 00:07:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:07:18,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:18,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:18,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:07:18,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:18,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash -364399091, now seen corresponding path program 1 times [2023-11-25 00:07:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593041452] [2023-11-25 00:07:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:18,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:20,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:20,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593041452] [2023-11-25 00:07:20,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593041452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:20,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:20,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:20,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39687364] [2023-11-25 00:07:20,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:20,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:20,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:20,658 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-25 00:07:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:20,879 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2023-11-25 00:07:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) Word has length 57 [2023-11-25 00:07:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:20,882 INFO L225 Difference]: With dead ends: 180 [2023-11-25 00:07:20,882 INFO L226 Difference]: Without dead ends: 160 [2023-11-25 00:07:20,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:20,884 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:20,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-25 00:07:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-25 00:07:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2023-11-25 00:07:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2023-11-25 00:07:20,895 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2023-11-25 00:07:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:20,896 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2023-11-25 00:07:20,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-25 00:07:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2023-11-25 00:07:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:07:20,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:20,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:20,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:07:20,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:20,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1536681717, now seen corresponding path program 1 times [2023-11-25 00:07:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:20,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191600411] [2023-11-25 00:07:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:23,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:23,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191600411] [2023-11-25 00:07:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191600411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:23,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:23,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386559521] [2023-11-25 00:07:23,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:23,205 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-25 00:07:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:23,459 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2023-11-25 00:07:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:23,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) Word has length 58 [2023-11-25 00:07:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:23,461 INFO L225 Difference]: With dead ends: 180 [2023-11-25 00:07:23,461 INFO L226 Difference]: Without dead ends: 160 [2023-11-25 00:07:23,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:23,462 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:23,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-25 00:07:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-25 00:07:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2023-11-25 00:07:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2023-11-25 00:07:23,478 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2023-11-25 00:07:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:23,478 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2023-11-25 00:07:23,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-25 00:07:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2023-11-25 00:07:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-25 00:07:23,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:23,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:07:23,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:23,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2100044573, now seen corresponding path program 1 times [2023-11-25 00:07:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908600321] [2023-11-25 00:07:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:26,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:26,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908600321] [2023-11-25 00:07:26,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908600321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:26,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:26,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:26,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64450949] [2023-11-25 00:07:26,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:26,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:26,450 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-25 00:07:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:26,647 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2023-11-25 00:07:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) Word has length 60 [2023-11-25 00:07:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:26,650 INFO L225 Difference]: With dead ends: 178 [2023-11-25 00:07:26,650 INFO L226 Difference]: Without dead ends: 158 [2023-11-25 00:07:26,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:26,652 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:26,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-25 00:07:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2023-11-25 00:07:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2023-11-25 00:07:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2023-11-25 00:07:26,676 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2023-11-25 00:07:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:26,676 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2023-11-25 00:07:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-25 00:07:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2023-11-25 00:07:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-25 00:07:26,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:26,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:26,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:07:26,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:26,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash 588827908, now seen corresponding path program 1 times [2023-11-25 00:07:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:26,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164362660] [2023-11-25 00:07:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:29,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:29,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164362660] [2023-11-25 00:07:29,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164362660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:29,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:29,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861851516] [2023-11-25 00:07:29,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:29,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:29,010 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-11-25 00:07:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:29,168 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2023-11-25 00:07:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) Word has length 61 [2023-11-25 00:07:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:29,170 INFO L225 Difference]: With dead ends: 179 [2023-11-25 00:07:29,170 INFO L226 Difference]: Without dead ends: 159 [2023-11-25 00:07:29,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:29,171 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:29,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:07:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-25 00:07:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2023-11-25 00:07:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2023-11-25 00:07:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2023-11-25 00:07:29,182 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2023-11-25 00:07:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:29,183 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2023-11-25 00:07:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-11-25 00:07:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2023-11-25 00:07:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-25 00:07:29,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:29,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:29,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:07:29,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash 437968810, now seen corresponding path program 1 times [2023-11-25 00:07:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812590746] [2023-11-25 00:07:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:32,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812590746] [2023-11-25 00:07:32,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812590746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:32,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:07:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825704982] [2023-11-25 00:07:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:32,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:07:32,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:07:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:32,122 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-25 00:07:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:32,334 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2023-11-25 00:07:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:07:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) Word has length 63 [2023-11-25 00:07:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:32,336 INFO L225 Difference]: With dead ends: 179 [2023-11-25 00:07:32,336 INFO L226 Difference]: Without dead ends: 159 [2023-11-25 00:07:32,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:07:32,338 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:32,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 554 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-25 00:07:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-11-25 00:07:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2023-11-25 00:07:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2023-11-25 00:07:32,349 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2023-11-25 00:07:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:32,350 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2023-11-25 00:07:32,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-25 00:07:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2023-11-25 00:07:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-25 00:07:32,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:32,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:32,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:07:32,353 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:32,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash 684790626, now seen corresponding path program 1 times [2023-11-25 00:07:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:32,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522063048] [2023-11-25 00:07:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:32,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522063048] [2023-11-25 00:07:32,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522063048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:32,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:32,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:07:32,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40555733] [2023-11-25 00:07:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:32,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:07:32,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:07:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:07:32,896 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2023-11-25 00:07:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:33,116 INFO L93 Difference]: Finished difference Result 182 states and 280 transitions. [2023-11-25 00:07:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:07:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) Word has length 64 [2023-11-25 00:07:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:33,120 INFO L225 Difference]: With dead ends: 182 [2023-11-25 00:07:33,120 INFO L226 Difference]: Without dead ends: 162 [2023-11-25 00:07:33,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:07:33,122 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 12 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:33,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 748 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:07:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-25 00:07:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2023-11-25 00:07:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-11-25 00:07:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2023-11-25 00:07:33,133 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2023-11-25 00:07:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:33,133 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2023-11-25 00:07:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2023-11-25 00:07:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2023-11-25 00:07:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-25 00:07:33,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:33,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-25 00:07:33,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:07:33,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:33,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:33,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1043174824, now seen corresponding path program 1 times [2023-11-25 00:07:33,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:33,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678914800] [2023-11-25 00:07:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:33,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:39,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678914800] [2023-11-25 00:07:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678914800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:07:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644285500] [2023-11-25 00:07:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:39,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:39,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe3c02c-e020-4b2c-8990-b83c21d9b960/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:07:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:39,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-25 00:07:39,507 INFO L285 TraceCheckSpWp]: Computing forward predicates...