./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/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_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/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_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/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 2218bd3b5024885ce258db0decccc6cd77d5db224efd54b84e54987ad5abfa77 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:19:27,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:19:27,128 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:19:27,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:19:27,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:19:27,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:19:27,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:19:27,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:19:27,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:19:27,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:19:27,181 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:19:27,182 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:19:27,184 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:19:27,189 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:19:27,189 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:19:27,190 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:19:27,191 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:19:27,192 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:19:27,193 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:19:27,193 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:19:27,194 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:19:27,195 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:19:27,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:19:27,196 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:19:27,197 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:19:27,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:19:27,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:19:27,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:19:27,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:19:27,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:19:27,200 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:19:27,201 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:19:27,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:19:27,202 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:19:27,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:19:27,203 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:19:27,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:19:27,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:27,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:19:27,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:19:27,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:19:27,204 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:19:27,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:19:27,205 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:19:27,206 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:19:27,206 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:19:27,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:19:27,206 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_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2218bd3b5024885ce258db0decccc6cd77d5db224efd54b84e54987ad5abfa77 [2023-11-24 23:19:27,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:27,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:27,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:27,542 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:27,542 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:27,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-24 23:19:30,638 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:19:30,909 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:19:30,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-24 23:19:30,925 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/data/aa061b372/8354fe12cfa64316a0888a3b1109bd1f/FLAG29fadecd4 [2023-11-24 23:19:30,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/data/aa061b372/8354fe12cfa64316a0888a3b1109bd1f [2023-11-24 23:19:30,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:19:30,942 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:19:30,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:30,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:19:30,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:19:30,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:30" (1/1) ... [2023-11-24 23:19:30,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33aac856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:30, skipping insertion in model container [2023-11-24 23:19:30,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:30" (1/1) ... [2023-11-24 23:19:31,022 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:31,252 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_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2023-11-24 23:19:31,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:31,339 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:31,395 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_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2023-11-24 23:19:31,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:31,499 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:31,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31 WrapperNode [2023-11-24 23:19:31,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:31,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:31,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:31,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:31,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,578 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 715 [2023-11-24 23:19:31,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:31,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:31,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:31,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:31,590 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,611 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,618 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,626 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:19:31,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:19:31,651 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:19:31,651 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:19:31,652 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (1/1) ... [2023-11-24 23:19:31,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:31,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:19:31,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7215eb75-2496-4f4a-bccf-03d7ce89b3bb/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:19:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:19:31,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:19:31,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:19:31,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:19:31,972 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:19:31,974 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:32,805 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:33,098 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:33,099 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:19:33,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:33 BoogieIcfgContainer [2023-11-24 23:19:33,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:33,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:33,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:33,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:33,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:19:30" (1/3) ... [2023-11-24 23:19:33,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f7e151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:33, skipping insertion in model container [2023-11-24 23:19:33,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:31" (2/3) ... [2023-11-24 23:19:33,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f7e151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:33, skipping insertion in model container [2023-11-24 23:19:33,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:33" (3/3) ... [2023-11-24 23:19:33,119 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-24 23:19:33,142 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:33,143 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:19:33,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:33,208 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;@2aa0a600, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:33,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:19:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:19:33,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:33,223 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] [2023-11-24 23:19:33,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:33,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1410696874, now seen corresponding path program 1 times [2023-11-24 23:19:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:33,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862663565] [2023-11-24 23:19:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:33,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:33,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862663565] [2023-11-24 23:19:33,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862663565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:33,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:19:33,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341644020] [2023-11-24 23:19:33,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:34,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:19:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:19:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:34,049 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 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 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:34,504 INFO L93 Difference]: Finished difference Result 395 states and 633 transitions. [2023-11-24 23:19:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 53 [2023-11-24 23:19:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:34,536 INFO L225 Difference]: With dead ends: 395 [2023-11-24 23:19:34,536 INFO L226 Difference]: Without dead ends: 315 [2023-11-24 23:19:34,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:34,549 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 659 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:34,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 774 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-24 23:19:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2023-11-24 23:19:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.396103896103896) internal successors, (430), 308 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 430 transitions. [2023-11-24 23:19:34,656 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 430 transitions. Word has length 53 [2023-11-24 23:19:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:34,657 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 430 transitions. [2023-11-24 23:19:34,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 430 transitions. [2023-11-24 23:19:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:19:34,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:34,663 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] [2023-11-24 23:19:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:19:34,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:34,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1900821696, now seen corresponding path program 1 times [2023-11-24 23:19:34,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:34,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885993780] [2023-11-24 23:19:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:34,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:34,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:34,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885993780] [2023-11-24 23:19:34,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885993780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:34,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:34,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866882653] [2023-11-24 23:19:34,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:34,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:34,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:34,985 INFO L87 Difference]: Start difference. First operand 309 states and 430 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:35,352 INFO L93 Difference]: Finished difference Result 739 states and 1060 transitions. [2023-11-24 23:19:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-24 23:19:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:35,356 INFO L225 Difference]: With dead ends: 739 [2023-11-24 23:19:35,356 INFO L226 Difference]: Without dead ends: 479 [2023-11-24 23:19:35,365 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 [2023-11-24 23:19:35,366 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 460 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:35,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 182 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-24 23:19:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2023-11-24 23:19:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.4285714285714286) internal successors, (680), 476 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 680 transitions. [2023-11-24 23:19:35,391 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 680 transitions. Word has length 54 [2023-11-24 23:19:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:35,391 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 680 transitions. [2023-11-24 23:19:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 680 transitions. [2023-11-24 23:19:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:19:35,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:35,395 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] [2023-11-24 23:19:35,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:19:35,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:35,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -70321762, now seen corresponding path program 1 times [2023-11-24 23:19:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:35,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520676234] [2023-11-24 23:19:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:35,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:35,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520676234] [2023-11-24 23:19:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520676234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:35,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541166317] [2023-11-24 23:19:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:35,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:35,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:35,600 INFO L87 Difference]: Start difference. First operand 477 states and 680 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:35,856 INFO L93 Difference]: Finished difference Result 1193 states and 1746 transitions. [2023-11-24 23:19:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:35,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-24 23:19:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:35,883 INFO L225 Difference]: With dead ends: 1193 [2023-11-24 23:19:35,883 INFO L226 Difference]: Without dead ends: 815 [2023-11-24 23:19:35,885 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 [2023-11-24 23:19:35,886 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 432 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:35,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 198 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-11-24 23:19:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 813. [2023-11-24 23:19:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.4532019704433496) internal successors, (1180), 812 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1180 transitions. [2023-11-24 23:19:35,918 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1180 transitions. Word has length 54 [2023-11-24 23:19:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:35,919 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1180 transitions. [2023-11-24 23:19:35,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1180 transitions. [2023-11-24 23:19:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:19:35,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:35,922 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] [2023-11-24 23:19:35,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:19:35,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:35,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:35,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2100565489, now seen corresponding path program 1 times [2023-11-24 23:19:35,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775404172] [2023-11-24 23:19:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:36,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:36,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775404172] [2023-11-24 23:19:36,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775404172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:36,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:36,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:36,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032653312] [2023-11-24 23:19:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:36,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:36,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:36,082 INFO L87 Difference]: Start difference. First operand 813 states and 1180 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:36,347 INFO L93 Difference]: Finished difference Result 2228 states and 3287 transitions. [2023-11-24 23:19:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:36,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-24 23:19:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:36,358 INFO L225 Difference]: With dead ends: 2228 [2023-11-24 23:19:36,358 INFO L226 Difference]: Without dead ends: 1487 [2023-11-24 23:19:36,360 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 [2023-11-24 23:19:36,369 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 437 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:36,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 190 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2023-11-24 23:19:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1485. [2023-11-24 23:19:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 1.463611859838275) internal successors, (2172), 1484 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2172 transitions. [2023-11-24 23:19:36,415 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2172 transitions. Word has length 54 [2023-11-24 23:19:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:36,416 INFO L495 AbstractCegarLoop]: Abstraction has 1485 states and 2172 transitions. [2023-11-24 23:19:36,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2172 transitions. [2023-11-24 23:19:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:19:36,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:36,424 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] [2023-11-24 23:19:36,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:19:36,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:36,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2087358031, now seen corresponding path program 1 times [2023-11-24 23:19:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010426559] [2023-11-24 23:19:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:36,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:36,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010426559] [2023-11-24 23:19:36,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010426559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:36,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:36,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:36,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390555959] [2023-11-24 23:19:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:36,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:36,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:36,654 INFO L87 Difference]: Start difference. First operand 1485 states and 2172 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:36,884 INFO L93 Difference]: Finished difference Result 3995 states and 5884 transitions. [2023-11-24 23:19:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:36,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-24 23:19:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:36,900 INFO L225 Difference]: With dead ends: 3995 [2023-11-24 23:19:36,900 INFO L226 Difference]: Without dead ends: 2543 [2023-11-24 23:19:36,926 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 [2023-11-24 23:19:36,926 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 453 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:36,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 174 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2023-11-24 23:19:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2541. [2023-11-24 23:19:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 1.4559055118110236) internal successors, (3698), 2540 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3698 transitions. [2023-11-24 23:19:36,990 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3698 transitions. Word has length 54 [2023-11-24 23:19:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:36,990 INFO L495 AbstractCegarLoop]: Abstraction has 2541 states and 3698 transitions. [2023-11-24 23:19:36,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-24 23:19:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3698 transitions. [2023-11-24 23:19:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:19:36,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:36,992 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] [2023-11-24 23:19:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:19:36,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:36,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1556458558, now seen corresponding path program 1 times [2023-11-24 23:19:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:36,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843629639] [2023-11-24 23:19:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:38,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843629639] [2023-11-24 23:19:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843629639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:38,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:38,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-24 23:19:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590574066] [2023-11-24 23:19:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:38,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:19:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:19:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:19:38,757 INFO L87 Difference]: Start difference. First operand 2541 states and 3698 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-24 23:19:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:39,888 INFO L93 Difference]: Finished difference Result 5297 states and 7697 transitions. [2023-11-24 23:19:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:19:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 [2023-11-24 23:19:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:39,920 INFO L225 Difference]: With dead ends: 5297 [2023-11-24 23:19:39,920 INFO L226 Difference]: Without dead ends: 5295 [2023-11-24 23:19:39,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:19:39,924 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 608 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:39,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 1006 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:19:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2023-11-24 23:19:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 4356. [2023-11-24 23:19:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 1.4507462686567165) internal successors, (6318), 4355 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 6318 transitions. [2023-11-24 23:19:40,073 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 6318 transitions. Word has length 55 [2023-11-24 23:19:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:40,073 INFO L495 AbstractCegarLoop]: Abstraction has 4356 states and 6318 transitions. [2023-11-24 23:19:40,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-24 23:19:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 6318 transitions. [2023-11-24 23:19:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:19:40,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:40,075 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] [2023-11-24 23:19:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:19:40,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:40,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 206003198, now seen corresponding path program 1 times [2023-11-24 23:19:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:40,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513652142] [2023-11-24 23:19:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:42,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:42,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513652142] [2023-11-24 23:19:42,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513652142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:42,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:42,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-24 23:19:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522353013] [2023-11-24 23:19:42,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:42,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 23:19:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 23:19:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:19:42,254 INFO L87 Difference]: Start difference. First operand 4356 states and 6318 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2023-11-24 23:19:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:44,772 INFO L93 Difference]: Finished difference Result 4979 states and 7200 transitions. [2023-11-24 23:19:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 23:19:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 [2023-11-24 23:19:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:44,808 INFO L225 Difference]: With dead ends: 4979 [2023-11-24 23:19:44,809 INFO L226 Difference]: Without dead ends: 4977 [2023-11-24 23:19:44,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:19:44,812 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1007 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:44,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1346 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 23:19:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-11-24 23:19:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4379. [2023-11-24 23:19:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 1.4490634993147555) internal successors, (6344), 4378 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6344 transitions. [2023-11-24 23:19:45,004 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6344 transitions. Word has length 55 [2023-11-24 23:19:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:45,006 INFO L495 AbstractCegarLoop]: Abstraction has 4379 states and 6344 transitions. [2023-11-24 23:19:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2023-11-24 23:19:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6344 transitions. [2023-11-24 23:19:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:19:45,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:45,009 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] [2023-11-24 23:19:45,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:19:45,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:45,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1021698078, now seen corresponding path program 1 times [2023-11-24 23:19:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:45,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562288053] [2023-11-24 23:19:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:46,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562288053] [2023-11-24 23:19:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562288053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:46,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-24 23:19:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514553965] [2023-11-24 23:19:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:19:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:19:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:19:46,360 INFO L87 Difference]: Start difference. First operand 4379 states and 6344 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-24 23:19:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:47,343 INFO L93 Difference]: Finished difference Result 6390 states and 9241 transitions. [2023-11-24 23:19:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:19:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 [2023-11-24 23:19:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:47,373 INFO L225 Difference]: With dead ends: 6390 [2023-11-24 23:19:47,373 INFO L226 Difference]: Without dead ends: 5604 [2023-11-24 23:19:47,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:19:47,377 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 609 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:47,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1692 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:19:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2023-11-24 23:19:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 5086. [2023-11-24 23:19:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 5085 states have (on average 1.4462143559488692) internal successors, (7354), 5085 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 7354 transitions. [2023-11-24 23:19:47,516 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 7354 transitions. Word has length 55 [2023-11-24 23:19:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:47,517 INFO L495 AbstractCegarLoop]: Abstraction has 5086 states and 7354 transitions. [2023-11-24 23:19:47,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-24 23:19:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 7354 transitions. [2023-11-24 23:19:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:19:47,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:47,519 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] [2023-11-24 23:19:47,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:19:47,519 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2112438178, now seen corresponding path program 1 times [2023-11-24 23:19:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:47,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782910621] [2023-11-24 23:19:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:49,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:49,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782910621] [2023-11-24 23:19:49,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782910621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:49,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:49,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-24 23:19:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182017163] [2023-11-24 23:19:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:19:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:19:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:19:49,416 INFO L87 Difference]: Start difference. First operand 5086 states and 7354 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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) [2023-11-24 23:19:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:52,384 INFO L93 Difference]: Finished difference Result 9150 states and 13271 transitions. [2023-11-24 23:19:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:19:52,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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 [2023-11-24 23:19:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:52,427 INFO L225 Difference]: With dead ends: 9150 [2023-11-24 23:19:52,428 INFO L226 Difference]: Without dead ends: 8364 [2023-11-24 23:19:52,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2023-11-24 23:19:52,432 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 948 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:52,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 1692 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-24 23:19:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8364 states. [2023-11-24 23:19:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8364 to 6386. [2023-11-24 23:19:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6385 states have (on average 1.4436961628817542) internal successors, (9218), 6385 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9218 transitions. [2023-11-24 23:19:52,597 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9218 transitions. Word has length 55 [2023-11-24 23:19:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:52,598 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 9218 transitions. [2023-11-24 23:19:52,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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) [2023-11-24 23:19:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9218 transitions. [2023-11-24 23:19:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 23:19:52,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:52,600 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] [2023-11-24 23:19:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:19:52,600 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:52,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:52,606 INFO L85 PathProgramCache]: Analyzing trace with hash -635244366, now seen corresponding path program 1 times [2023-11-24 23:19:52,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:52,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646771335] [2023-11-24 23:19:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:55,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:55,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646771335] [2023-11-24 23:19:55,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646771335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:55,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:55,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-24 23:19:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453095632] [2023-11-24 23:19:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:19:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:19:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:19:55,008 INFO L87 Difference]: Start difference. First operand 6386 states and 9218 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2023-11-24 23:19:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:58,080 INFO L93 Difference]: Finished difference Result 8543 states and 12303 transitions. [2023-11-24 23:19:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:19:58,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 [2023-11-24 23:19:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:58,116 INFO L225 Difference]: With dead ends: 8543 [2023-11-24 23:19:58,116 INFO L226 Difference]: Without dead ends: 8541 [2023-11-24 23:19:58,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 23:19:58,121 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 712 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:58,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1861 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-24 23:19:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2023-11-24 23:19:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 6402. [2023-11-24 23:19:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 1.4428995469457897) internal successors, (9236), 6401 states have internal predecessors, (9236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 9236 transitions. [2023-11-24 23:19:58,301 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 9236 transitions. Word has length 57 [2023-11-24 23:19:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:58,302 INFO L495 AbstractCegarLoop]: Abstraction has 6402 states and 9236 transitions. [2023-11-24 23:19:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2023-11-24 23:19:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 9236 transitions. [2023-11-24 23:19:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 23:19:58,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:58,304 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] [2023-11-24 23:19:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:19:58,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:58,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 40314994, now seen corresponding path program 1 times [2023-11-24 23:19:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:58,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160220736] [2023-11-24 23:19:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:58,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:59,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160220736] [2023-11-24 23:19:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160220736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:59,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:59,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-24 23:19:59,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507558835] [2023-11-24 23:19:59,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 23:19:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 23:19:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:19:59,824 INFO L87 Difference]: Start difference. First operand 6402 states and 9236 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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) [2023-11-24 23:20:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:02,116 INFO L93 Difference]: Finished difference Result 7049 states and 10142 transitions. [2023-11-24 23:20:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 23:20:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 [2023-11-24 23:20:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:02,128 INFO L225 Difference]: With dead ends: 7049 [2023-11-24 23:20:02,129 INFO L226 Difference]: Without dead ends: 7047 [2023-11-24 23:20:02,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 23:20:02,132 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 654 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:02,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1571 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 23:20:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2023-11-24 23:20:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6408. [2023-11-24 23:20:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6408 states, 6407 states have (on average 1.4426408615576714) internal successors, (9243), 6407 states have internal predecessors, (9243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 9243 transitions. [2023-11-24 23:20:02,260 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 9243 transitions. Word has length 57 [2023-11-24 23:20:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:02,260 INFO L495 AbstractCegarLoop]: Abstraction has 6408 states and 9243 transitions. [2023-11-24 23:20:02,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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) [2023-11-24 23:20:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 9243 transitions. [2023-11-24 23:20:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 23:20:02,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:02,263 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] [2023-11-24 23:20:02,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:20:02,263 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:02,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 257902834, now seen corresponding path program 1 times [2023-11-24 23:20:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299625032] [2023-11-24 23:20:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:04,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:04,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299625032] [2023-11-24 23:20:04,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299625032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:04,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:04,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-24 23:20:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791601859] [2023-11-24 23:20:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:20:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:20:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:20:04,057 INFO L87 Difference]: Start difference. First operand 6408 states and 9243 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2023-11-24 23:20:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:07,408 INFO L93 Difference]: Finished difference Result 9193 states and 13273 transitions. [2023-11-24 23:20:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:20:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 [2023-11-24 23:20:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:07,424 INFO L225 Difference]: With dead ends: 9193 [2023-11-24 23:20:07,424 INFO L226 Difference]: Without dead ends: 9191 [2023-11-24 23:20:07,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2023-11-24 23:20:07,429 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 708 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 2273 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-24 23:20:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9191 states. [2023-11-24 23:20:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9191 to 6418. [2023-11-24 23:20:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6418 states, 6417 states have (on average 1.4424185756584074) internal successors, (9256), 6417 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 9256 transitions. [2023-11-24 23:20:07,623 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 9256 transitions. Word has length 57 [2023-11-24 23:20:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:07,624 INFO L495 AbstractCegarLoop]: Abstraction has 6418 states and 9256 transitions. [2023-11-24 23:20:07,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2023-11-24 23:20:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 9256 transitions. [2023-11-24 23:20:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 23:20:07,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:07,626 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] [2023-11-24 23:20:07,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:20:07,626 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:07,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1092552526, now seen corresponding path program 1 times [2023-11-24 23:20:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693936836] [2023-11-24 23:20:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:09,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:09,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693936836] [2023-11-24 23:20:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693936836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:09,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-24 23:20:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518025754] [2023-11-24 23:20:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 23:20:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 23:20:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:20:09,482 INFO L87 Difference]: Start difference. First operand 6418 states and 9256 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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) [2023-11-24 23:20:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:12,498 INFO L93 Difference]: Finished difference Result 7087 states and 10188 transitions. [2023-11-24 23:20:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:20:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 [2023-11-24 23:20:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:12,511 INFO L225 Difference]: With dead ends: 7087 [2023-11-24 23:20:12,512 INFO L226 Difference]: Without dead ends: 7085 [2023-11-24 23:20:12,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 23:20:12,515 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 775 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:12,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 1644 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 23:20:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7085 states. [2023-11-24 23:20:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7085 to 6424. [2023-11-24 23:20:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 1.442316674451191) internal successors, (9264), 6423 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 9264 transitions. [2023-11-24 23:20:12,633 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 9264 transitions. Word has length 57 [2023-11-24 23:20:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:12,633 INFO L495 AbstractCegarLoop]: Abstraction has 6424 states and 9264 transitions. [2023-11-24 23:20:12,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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) [2023-11-24 23:20:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 9264 transitions. [2023-11-24 23:20:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-24 23:20:12,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:12,635 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] [2023-11-24 23:20:12,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:20:12,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:12,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1336931795, now seen corresponding path program 1 times [2023-11-24 23:20:12,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:12,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340455342] [2023-11-24 23:20:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:12,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:12,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340455342] [2023-11-24 23:20:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340455342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:12,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099749404] [2023-11-24 23:20:12,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:12,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:12,684 INFO L87 Difference]: Start difference. First operand 6424 states and 9264 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:12,758 INFO L93 Difference]: Finished difference Result 11575 states and 16771 transitions. [2023-11-24 23:20:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2023-11-24 23:20:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:12,770 INFO L225 Difference]: With dead ends: 11575 [2023-11-24 23:20:12,770 INFO L226 Difference]: Without dead ends: 6273 [2023-11-24 23:20:12,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:12,778 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 108 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:12,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 296 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:20:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6273 states. [2023-11-24 23:20:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6273 to 6207. [2023-11-24 23:20:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6207 states, 6206 states have (on average 1.43989687399291) internal successors, (8936), 6206 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6207 states to 6207 states and 8936 transitions. [2023-11-24 23:20:12,890 INFO L78 Accepts]: Start accepts. Automaton has 6207 states and 8936 transitions. Word has length 58 [2023-11-24 23:20:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:12,890 INFO L495 AbstractCegarLoop]: Abstraction has 6207 states and 8936 transitions. [2023-11-24 23:20:12,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6207 states and 8936 transitions. [2023-11-24 23:20:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-24 23:20:12,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:12,892 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] [2023-11-24 23:20:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:20:12,892 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:12,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1733763792, now seen corresponding path program 1 times [2023-11-24 23:20:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:12,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839073971] [2023-11-24 23:20:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:12,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:12,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839073971] [2023-11-24 23:20:12,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839073971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:12,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:12,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273064702] [2023-11-24 23:20:12,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:12,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:12,938 INFO L87 Difference]: Start difference. First operand 6207 states and 8936 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:13,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:13,011 INFO L93 Difference]: Finished difference Result 11147 states and 16121 transitions. [2023-11-24 23:20:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2023-11-24 23:20:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:13,022 INFO L225 Difference]: With dead ends: 11147 [2023-11-24 23:20:13,022 INFO L226 Difference]: Without dead ends: 5999 [2023-11-24 23:20:13,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:13,030 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 107 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:13,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 288 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:20:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5999 states. [2023-11-24 23:20:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5999 to 5997. [2023-11-24 23:20:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 1.4377918612408271) internal successors, (8621), 5996 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 8621 transitions. [2023-11-24 23:20:13,138 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 8621 transitions. Word has length 58 [2023-11-24 23:20:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:13,138 INFO L495 AbstractCegarLoop]: Abstraction has 5997 states and 8621 transitions. [2023-11-24 23:20:13,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 8621 transitions. [2023-11-24 23:20:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-24 23:20:13,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:13,140 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] [2023-11-24 23:20:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:20:13,140 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:13,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2063638654, now seen corresponding path program 1 times [2023-11-24 23:20:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320000552] [2023-11-24 23:20:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:13,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320000552] [2023-11-24 23:20:13,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320000552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:13,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338251924] [2023-11-24 23:20:13,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:13,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:13,187 INFO L87 Difference]: Start difference. First operand 5997 states and 8621 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:13,257 INFO L93 Difference]: Finished difference Result 9389 states and 13548 transitions. [2023-11-24 23:20:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2023-11-24 23:20:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:13,266 INFO L225 Difference]: With dead ends: 9389 [2023-11-24 23:20:13,266 INFO L226 Difference]: Without dead ends: 5706 [2023-11-24 23:20:13,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:13,272 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 111 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:13,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 276 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:20:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2023-11-24 23:20:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 5704. [2023-11-24 23:20:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.4367876556198491) internal successors, (8194), 5703 states have internal predecessors, (8194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 8194 transitions. [2023-11-24 23:20:13,422 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 8194 transitions. Word has length 58 [2023-11-24 23:20:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:13,423 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 8194 transitions. [2023-11-24 23:20:13,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 8194 transitions. [2023-11-24 23:20:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-24 23:20:13,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:13,425 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] [2023-11-24 23:20:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 23:20:13,425 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:13,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1738040429, now seen corresponding path program 1 times [2023-11-24 23:20:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168161622] [2023-11-24 23:20:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:13,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:13,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168161622] [2023-11-24 23:20:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168161622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:13,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:13,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048771385] [2023-11-24 23:20:13,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:13,485 INFO L87 Difference]: Start difference. First operand 5704 states and 8194 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-24 23:20:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:13,562 INFO L93 Difference]: Finished difference Result 9760 states and 14076 transitions. [2023-11-24 23:20:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2023-11-24 23:20:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:13,573 INFO L225 Difference]: With dead ends: 9760 [2023-11-24 23:20:13,573 INFO L226 Difference]: Without dead ends: 5472 [2023-11-24 23:20:13,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:13,580 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 102 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:13,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 276 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:20:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states.