./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire --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 a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:30:55,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:30:55,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:30:55,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:30:55,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:30:55,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:30:55,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:30:55,828 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:30:55,829 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:30:55,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:30:55,835 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:30:55,835 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:30:55,836 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:30:55,836 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:30:55,837 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:30:55,837 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:30:55,838 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:30:55,838 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:30:55,838 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:30:55,839 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:30:55,841 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:30:55,841 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:30:55,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:30:55,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:30:55,853 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:30:55,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:30:55,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:30:55,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:30:55,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:30:55,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:30:55,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:30:55,856 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:30:55,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:30:55,857 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:30:55,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:30:55,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:30:55,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:30:55,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:55,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:30:55,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:30:55,859 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:30:55,859 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:30:55,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:30:55,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:30:55,860 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:30:55,861 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:30:55,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:30:55,861 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_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d [2023-11-23 21:30:56,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:30:56,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:30:56,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:30:56,209 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:30:56,209 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:30:56,211 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-23 21:30:59,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:30:59,567 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:30:59,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-23 21:30:59,579 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/data/0a806df0b/0c508423dc5b44c9963320928fa00eb3/FLAGcd6ae381f [2023-11-23 21:30:59,591 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/data/0a806df0b/0c508423dc5b44c9963320928fa00eb3 [2023-11-23 21:30:59,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:30:59,595 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:30:59,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:59,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:30:59,602 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:30:59,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:59" (1/1) ... [2023-11-23 21:30:59,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a4d3da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:59, skipping insertion in model container [2023-11-23 21:30:59,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:59" (1/1) ... [2023-11-23 21:30:59,647 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:59,882 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_546733fa-108a-401c-a624-9887169befe7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2023-11-23 21:30:59,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:59,951 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:30:59,988 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_546733fa-108a-401c-a624-9887169befe7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2023-11-23 21:31:00,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:00,023 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:00,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00 WrapperNode [2023-11-23 21:31:00,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:00,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:00,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:00,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:00,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,044 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,080 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 355 [2023-11-23 21:31:00,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:00,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:00,082 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:00,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:00,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,103 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,112 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,154 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:00,155 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:00,155 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:00,155 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:00,156 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (1/1) ... [2023-11-23 21:31:00,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:00,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:00,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:00,424 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:00,427 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:00,998 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:01,190 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:01,190 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:31:01,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:01 BoogieIcfgContainer [2023-11-23 21:31:01,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:01,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:01,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:01,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:01,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:30:59" (1/3) ... [2023-11-23 21:31:01,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9d731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:01, skipping insertion in model container [2023-11-23 21:31:01,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:00" (2/3) ... [2023-11-23 21:31:01,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9d731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:01, skipping insertion in model container [2023-11-23 21:31:01,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:01" (3/3) ... [2023-11-23 21:31:01,201 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-23 21:31:01,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:01,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:01,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:01,279 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;@446a0af6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:01,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 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) [2023-11-23 21:31:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:31:01,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:01,293 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] [2023-11-23 21:31:01,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:01,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 262034080, now seen corresponding path program 1 times [2023-11-23 21:31:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:01,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824303735] [2023-11-23 21:31:01,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:01,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:01,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824303735] [2023-11-23 21:31:01,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824303735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:01,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:01,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:01,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943396985] [2023-11-23 21:31:01,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:01,728 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 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 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-23 21:31:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:01,805 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2023-11-23 21:31:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2023-11-23 21:31:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:01,817 INFO L225 Difference]: With dead ends: 143 [2023-11-23 21:31:01,817 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 21:31:01,820 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 [2023-11-23 21:31:01,824 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:01,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 188 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 21:31:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-11-23 21:31:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 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) [2023-11-23 21:31:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2023-11-23 21:31:01,865 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 28 [2023-11-23 21:31:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:01,866 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2023-11-23 21:31:01,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-23 21:31:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2023-11-23 21:31:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 21:31:01,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:01,868 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] [2023-11-23 21:31:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:01,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash -297391458, now seen corresponding path program 1 times [2023-11-23 21:31:01,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:01,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714135302] [2023-11-23 21:31:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:01,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:02,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:02,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714135302] [2023-11-23 21:31:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714135302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:02,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:02,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434800073] [2023-11-23 21:31:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:02,067 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-23 21:31:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:02,110 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2023-11-23 21:31:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:02,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 31 [2023-11-23 21:31:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:02,113 INFO L225 Difference]: With dead ends: 216 [2023-11-23 21:31:02,114 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 21:31:02,115 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 [2023-11-23 21:31:02,116 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 150 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 21:31:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2023-11-23 21:31:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4285714285714286) internal successors, (200), 140 states have internal predecessors, (200), 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) [2023-11-23 21:31:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 200 transitions. [2023-11-23 21:31:02,141 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 200 transitions. Word has length 31 [2023-11-23 21:31:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:02,141 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 200 transitions. [2023-11-23 21:31:02,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-23 21:31:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 200 transitions. [2023-11-23 21:31:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:31:02,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:02,149 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] [2023-11-23 21:31:02,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:31:02,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:02,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash -843010126, now seen corresponding path program 1 times [2023-11-23 21:31:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:02,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837456357] [2023-11-23 21:31:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:02,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:02,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:02,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837456357] [2023-11-23 21:31:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837456357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:02,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:02,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083173464] [2023-11-23 21:31:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:02,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:02,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:02,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:02,295 INFO L87 Difference]: Start difference. First operand 141 states and 200 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-23 21:31:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:02,335 INFO L93 Difference]: Finished difference Result 341 states and 494 transitions. [2023-11-23 21:31:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2023-11-23 21:31:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:02,340 INFO L225 Difference]: With dead ends: 341 [2023-11-23 21:31:02,340 INFO L226 Difference]: Without dead ends: 219 [2023-11-23 21:31:02,342 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 [2023-11-23 21:31:02,343 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:02,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-23 21:31:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2023-11-23 21:31:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 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) [2023-11-23 21:31:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2023-11-23 21:31:02,370 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 34 [2023-11-23 21:31:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:02,371 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2023-11-23 21:31:02,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-23 21:31:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2023-11-23 21:31:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:31:02,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:02,374 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] [2023-11-23 21:31:02,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:31:02,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:02,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash 853936617, now seen corresponding path program 1 times [2023-11-23 21:31:02,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:02,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989925651] [2023-11-23 21:31:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:02,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:02,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989925651] [2023-11-23 21:31:02,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989925651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:02,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:02,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:02,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872313809] [2023-11-23 21:31:02,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:02,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:02,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:02,586 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-23 21:31:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:02,697 INFO L93 Difference]: Finished difference Result 703 states and 1007 transitions. [2023-11-23 21:31:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:02,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2023-11-23 21:31:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:02,702 INFO L225 Difference]: With dead ends: 703 [2023-11-23 21:31:02,702 INFO L226 Difference]: Without dead ends: 505 [2023-11-23 21:31:02,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:02,705 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 162 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:02,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 267 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-11-23 21:31:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 501. [2023-11-23 21:31:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.424) internal successors, (712), 500 states have internal predecessors, (712), 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) [2023-11-23 21:31:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 712 transitions. [2023-11-23 21:31:02,745 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 712 transitions. Word has length 37 [2023-11-23 21:31:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:02,745 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 712 transitions. [2023-11-23 21:31:02,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-23 21:31:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 712 transitions. [2023-11-23 21:31:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:31:02,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:02,748 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] [2023-11-23 21:31:02,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:31:02,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:02,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1593970368, now seen corresponding path program 1 times [2023-11-23 21:31:02,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:02,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940786789] [2023-11-23 21:31:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:02,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:02,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:02,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940786789] [2023-11-23 21:31:02,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940786789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:02,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:02,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:31:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988842161] [2023-11-23 21:31:02,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:02,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:02,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:02,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:02,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:02,870 INFO L87 Difference]: Start difference. First operand 501 states and 712 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-11-23 21:31:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:03,059 INFO L93 Difference]: Finished difference Result 1283 states and 1846 transitions. [2023-11-23 21:31:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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 39 [2023-11-23 21:31:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:03,068 INFO L225 Difference]: With dead ends: 1283 [2023-11-23 21:31:03,069 INFO L226 Difference]: Without dead ends: 801 [2023-11-23 21:31:03,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:31:03,078 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 336 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:03,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 82 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-11-23 21:31:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 799. [2023-11-23 21:31:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.418546365914787) internal successors, (1132), 798 states have internal predecessors, (1132), 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) [2023-11-23 21:31:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2023-11-23 21:31:03,121 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2023-11-23 21:31:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:03,123 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2023-11-23 21:31:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-11-23 21:31:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2023-11-23 21:31:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:31:03,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:03,133 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] [2023-11-23 21:31:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:31:03,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:03,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2077146171, now seen corresponding path program 1 times [2023-11-23 21:31:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:03,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004948535] [2023-11-23 21:31:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:03,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:03,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004948535] [2023-11-23 21:31:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004948535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:03,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:31:03,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127455770] [2023-11-23 21:31:03,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:03,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:03,830 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2023-11-23 21:31:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:04,111 INFO L93 Difference]: Finished difference Result 1478 states and 2095 transitions. [2023-11-23 21:31:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:31:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 39 [2023-11-23 21:31:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:04,132 INFO L225 Difference]: With dead ends: 1478 [2023-11-23 21:31:04,132 INFO L226 Difference]: Without dead ends: 1476 [2023-11-23 21:31:04,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:31:04,141 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 461 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:04,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 692 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2023-11-23 21:31:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 936. [2023-11-23 21:31:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.4171122994652405) internal successors, (1325), 935 states have internal predecessors, (1325), 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) [2023-11-23 21:31:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1325 transitions. [2023-11-23 21:31:04,192 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1325 transitions. Word has length 39 [2023-11-23 21:31:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:04,193 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1325 transitions. [2023-11-23 21:31:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2023-11-23 21:31:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1325 transitions. [2023-11-23 21:31:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:31:04,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:04,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2023-11-23 21:31:04,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:04,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:04,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash -785035865, now seen corresponding path program 1 times [2023-11-23 21:31:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:04,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130194461] [2023-11-23 21:31:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:05,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:05,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130194461] [2023-11-23 21:31:05,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130194461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:05,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236202914] [2023-11-23 21:31:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:05,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:05,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:05,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546733fa-108a-401c-a624-9887169befe7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:05,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 21:31:05,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:07,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:13,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236202914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:13,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148035468] [2023-11-23 21:31:13,834 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 21:31:13,834 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:13,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:13,846 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:13,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:43,475 INFO L180 IcfgInterpreter]: Interpretation finished