./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX --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 d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:52:27,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:52:27,570 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:52:27,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:52:27,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:52:27,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:52:27,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:52:27,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:52:27,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:52:27,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:52:27,630 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:52:27,631 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:52:27,631 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:52:27,633 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:52:27,633 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:52:27,634 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:52:27,634 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:52:27,635 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:52:27,635 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:52:27,635 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:52:27,636 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:52:27,636 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:52:27,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:52:27,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:52:27,638 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:52:27,639 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:52:27,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:52:27,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:52:27,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:52:27,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:52:27,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:52:27,642 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:52:27,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:52:27,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:52:27,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:52:27,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:52:27,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:27,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:52:27,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:52:27,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:52:27,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:52:27,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:52:27,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:52:27,645 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:52:27,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:52:27,646 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_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e [2023-11-12 00:52:27,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:52:27,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:52:27,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:52:27,973 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:52:27,974 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:52:27,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-11-12 00:52:31,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:52:31,580 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:52:31,586 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-11-12 00:52:31,625 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/data/e7151f9f9/fa966a76a1a9461aaa403a90be6b70f0/FLAG72dda601f [2023-11-12 00:52:31,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/data/e7151f9f9/fa966a76a1a9461aaa403a90be6b70f0 [2023-11-12 00:52:31,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:52:31,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:52:31,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:31,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:52:31,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:52:31,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:31" (1/1) ... [2023-11-12 00:52:31,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b0d888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:31, skipping insertion in model container [2023-11-12 00:52:31,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:31" (1/1) ... [2023-11-12 00:52:31,765 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:52:32,116 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_870a44f6-1fb1-4e19-bb13-4a204f84b0db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2023-11-12 00:52:32,232 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_870a44f6-1fb1-4e19-bb13-4a204f84b0db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2023-11-12 00:52:32,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:32,538 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:52:32,680 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_870a44f6-1fb1-4e19-bb13-4a204f84b0db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2023-11-12 00:52:32,820 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_870a44f6-1fb1-4e19-bb13-4a204f84b0db/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2023-11-12 00:52:33,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:33,033 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:52:33,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33 WrapperNode [2023-11-12 00:52:33,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:33,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:33,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:52:33,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:52:33,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,202 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3640 [2023-11-12 00:52:33,203 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:33,204 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:52:33,204 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:52:33,204 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:52:33,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,282 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,320 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:52:33,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:52:33,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:52:33,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:52:33,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (1/1) ... [2023-11-12 00:52:33,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:33,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:52:33,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a44f6-1fb1-4e19-bb13-4a204f84b0db/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:52:33,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:52:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:52:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:52:33,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:52:33,727 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:52:33,729 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:52:36,138 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:52:36,414 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:52:36,414 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:52:36,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:36 BoogieIcfgContainer [2023-11-12 00:52:36,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:52:36,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:52:36,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:52:36,425 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:52:36,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:52:31" (1/3) ... [2023-11-12 00:52:36,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12970012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:36, skipping insertion in model container [2023-11-12 00:52:36,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:33" (2/3) ... [2023-11-12 00:52:36,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12970012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:36, skipping insertion in model container [2023-11-12 00:52:36,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:36" (3/3) ... [2023-11-12 00:52:36,429 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-11-12 00:52:36,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:52:36,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:52:36,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:36,543 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;@5b600b03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:36,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:52:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 662 states, 659 states have (on average 1.7890743550834598) internal successors, (1179), 661 states have internal predecessors, (1179), 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) [2023-11-12 00:52:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-12 00:52:36,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:36,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:36,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:36,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1229301387, now seen corresponding path program 1 times [2023-11-12 00:52:36,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:36,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464533257] [2023-11-12 00:52:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:36,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:37,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464533257] [2023-11-12 00:52:37,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464533257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:37,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:37,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:52:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207373120] [2023-11-12 00:52:37,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:52:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:52:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:52:37,117 INFO L87 Difference]: Start difference. First operand has 662 states, 659 states have (on average 1.7890743550834598) internal successors, (1179), 661 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:52:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:37,355 INFO L93 Difference]: Finished difference Result 959 states and 1669 transitions. [2023-11-12 00:52:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:52:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-12 00:52:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:37,383 INFO L225 Difference]: With dead ends: 959 [2023-11-12 00:52:37,384 INFO L226 Difference]: Without dead ends: 779 [2023-11-12 00:52:37,390 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 [2023-11-12 00:52:37,396 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 588 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:37,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1916 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:52:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-11-12 00:52:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2023-11-12 00:52:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 775 states have (on average 1.343225806451613) internal successors, (1041), 776 states have internal predecessors, (1041), 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) [2023-11-12 00:52:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1041 transitions. [2023-11-12 00:52:37,513 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1041 transitions. Word has length 61 [2023-11-12 00:52:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:37,514 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1041 transitions. [2023-11-12 00:52:37,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:52:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1041 transitions. [2023-11-12 00:52:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 00:52:37,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:37,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:37,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:52:37,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:37,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1202740473, now seen corresponding path program 1 times [2023-11-12 00:52:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776064857] [2023-11-12 00:52:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:37,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776064857] [2023-11-12 00:52:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776064857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:37,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:52:37,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669542103] [2023-11-12 00:52:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:37,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:52:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:37,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:52:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:52:37,724 INFO L87 Difference]: Start difference. First operand 777 states and 1041 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-12 00:52:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:37,914 INFO L93 Difference]: Finished difference Result 1290 states and 1726 transitions. [2023-11-12 00:52:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:52:37,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2023-11-12 00:52:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:37,923 INFO L225 Difference]: With dead ends: 1290 [2023-11-12 00:52:37,924 INFO L226 Difference]: Without dead ends: 1107 [2023-11-12 00:52:37,931 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 [2023-11-12 00:52:37,933 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 499 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:37,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 1525 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:52:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2023-11-12 00:52:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1103. [2023-11-12 00:52:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1101 states have (on average 1.32425068119891) internal successors, (1458), 1102 states have internal predecessors, (1458), 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) [2023-11-12 00:52:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1458 transitions. [2023-11-12 00:52:37,987 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1458 transitions. Word has length 62 [2023-11-12 00:52:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:37,988 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1458 transitions. [2023-11-12 00:52:37,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-12 00:52:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1458 transitions. [2023-11-12 00:52:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 00:52:37,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:37,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:37,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:52:37,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1419941485, now seen corresponding path program 1 times [2023-11-12 00:52:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784974346] [2023-11-12 00:52:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:38,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784974346] [2023-11-12 00:52:38,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784974346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:38,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:52:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794135649] [2023-11-12 00:52:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:52:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:52:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:52:38,210 INFO L87 Difference]: Start difference. First operand 1103 states and 1458 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-12 00:52:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:38,307 INFO L93 Difference]: Finished difference Result 1896 states and 2572 transitions. [2023-11-12 00:52:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:52:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2023-11-12 00:52:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:38,318 INFO L225 Difference]: With dead ends: 1896 [2023-11-12 00:52:38,319 INFO L226 Difference]: Without dead ends: 1478 [2023-11-12 00:52:38,326 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 [2023-11-12 00:52:38,327 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 445 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:38,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1419 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:52:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2023-11-12 00:52:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1474. [2023-11-12 00:52:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1472 states have (on average 1.3376358695652173) internal successors, (1969), 1473 states have internal predecessors, (1969), 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) [2023-11-12 00:52:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1969 transitions. [2023-11-12 00:52:38,376 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1969 transitions. Word has length 62 [2023-11-12 00:52:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:38,384 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 1969 transitions. [2023-11-12 00:52:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-12 00:52:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1969 transitions. [2023-11-12 00:52:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 00:52:38,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:38,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:38,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:52:38,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:38,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1452563052, now seen corresponding path program 1 times [2023-11-12 00:52:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:38,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692826605] [2023-11-12 00:52:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:38,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:38,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692826605] [2023-11-12 00:52:38,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692826605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:38,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:38,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:52:38,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946189689] [2023-11-12 00:52:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:38,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:52:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:52:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:52:38,620 INFO L87 Difference]: Start difference. First operand 1474 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-12 00:52:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:39,231 INFO L93 Difference]: Finished difference Result 3114 states and 4236 transitions. [2023-11-12 00:52:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 62 [2023-11-12 00:52:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:39,271 INFO L225 Difference]: With dead ends: 3114 [2023-11-12 00:52:39,271 INFO L226 Difference]: Without dead ends: 1863 [2023-11-12 00:52:39,275 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 [2023-11-12 00:52:39,284 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 2233 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:39,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 502 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:52:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2023-11-12 00:52:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1861. [2023-11-12 00:52:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1859 states have (on average 1.3550295857988166) internal successors, (2519), 1860 states have internal predecessors, (2519), 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) [2023-11-12 00:52:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2519 transitions. [2023-11-12 00:52:39,346 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2519 transitions. Word has length 62 [2023-11-12 00:52:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:39,348 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 2519 transitions. [2023-11-12 00:52:39,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-12 00:52:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2519 transitions. [2023-11-12 00:52:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 00:52:39,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:39,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:39,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:52:39,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:39,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1875740527, now seen corresponding path program 1 times [2023-11-12 00:52:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759266056] [2023-11-12 00:52:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:39,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:39,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759266056] [2023-11-12 00:52:39,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759266056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:39,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:52:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845487869] [2023-11-12 00:52:39,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:52:39,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:52:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:52:39,482 INFO L87 Difference]: Start difference. First operand 1861 states and 2519 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:52:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:39,564 INFO L93 Difference]: Finished difference Result 3997 states and 5482 transitions. [2023-11-12 00:52:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:52:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-12 00:52:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:39,580 INFO L225 Difference]: With dead ends: 3997 [2023-11-12 00:52:39,580 INFO L226 Difference]: Without dead ends: 2876 [2023-11-12 00:52:39,582 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 [2023-11-12 00:52:39,583 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 537 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:39,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1325 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:52:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2023-11-12 00:52:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2874. [2023-11-12 00:52:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2872 states have (on average 1.3506267409470751) internal successors, (3879), 2873 states have internal predecessors, (3879), 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) [2023-11-12 00:52:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 3879 transitions. [2023-11-12 00:52:39,674 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 3879 transitions. Word has length 63 [2023-11-12 00:52:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:39,674 INFO L495 AbstractCegarLoop]: Abstraction has 2874 states and 3879 transitions. [2023-11-12 00:52:39,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:52:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 3879 transitions. [2023-11-12 00:52:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 00:52:39,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:39,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:52:39,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:39,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 143702479, now seen corresponding path program 1 times [2023-11-12 00:52:39,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:39,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707964494] [2023-11-12 00:52:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:39,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707964494] [2023-11-12 00:52:39,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707964494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:39,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:39,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:52:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430951402] [2023-11-12 00:52:39,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:39,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:52:39,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:52:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:52:39,937 INFO L87 Difference]: Start difference. First operand 2874 states and 3879 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:52:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:40,541 INFO L93 Difference]: Finished difference Result 6684 states and 9132 transitions. [2023-11-12 00:52:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-12 00:52:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:40,569 INFO L225 Difference]: With dead ends: 6684 [2023-11-12 00:52:40,569 INFO L226 Difference]: Without dead ends: 4143 [2023-11-12 00:52:40,573 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 [2023-11-12 00:52:40,574 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1958 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:40,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1958 Valid, 436 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:52:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2023-11-12 00:52:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4139. [2023-11-12 00:52:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4137 states have (on average 1.3579888808315204) internal successors, (5618), 4138 states have internal predecessors, (5618), 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) [2023-11-12 00:52:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5618 transitions. [2023-11-12 00:52:40,694 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5618 transitions. Word has length 64 [2023-11-12 00:52:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:40,695 INFO L495 AbstractCegarLoop]: Abstraction has 4139 states and 5618 transitions. [2023-11-12 00:52:40,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:52:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5618 transitions. [2023-11-12 00:52:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 00:52:40,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:40,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:40,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:52:40,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:40,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1303417230, now seen corresponding path program 1 times [2023-11-12 00:52:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474449996] [2023-11-12 00:52:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:40,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474449996] [2023-11-12 00:52:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474449996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:40,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:40,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:52:40,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860081050] [2023-11-12 00:52:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:40,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:52:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:52:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:52:40,868 INFO L87 Difference]: Start difference. First operand 4139 states and 5618 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-12 00:52:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:41,413 INFO L93 Difference]: Finished difference Result 10721 states and 14692 transitions. [2023-11-12 00:52:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2023-11-12 00:52:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:41,451 INFO L225 Difference]: With dead ends: 10721 [2023-11-12 00:52:41,451 INFO L226 Difference]: Without dead ends: 6866 [2023-11-12 00:52:41,456 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 [2023-11-12 00:52:41,458 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1965 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:41,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1965 Valid, 471 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:52:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2023-11-12 00:52:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 5339. [2023-11-12 00:52:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5337 states have (on average 1.3672475173318344) internal successors, (7297), 5338 states have internal predecessors, (7297), 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) [2023-11-12 00:52:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 7297 transitions. [2023-11-12 00:52:41,607 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 7297 transitions. Word has length 65 [2023-11-12 00:52:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:41,607 INFO L495 AbstractCegarLoop]: Abstraction has 5339 states and 7297 transitions. [2023-11-12 00:52:41,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-12 00:52:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 7297 transitions. [2023-11-12 00:52:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 00:52:41,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:41,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:52:41,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:41,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1163054926, now seen corresponding path program 1 times [2023-11-12 00:52:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435260674] [2023-11-12 00:52:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:41,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:41,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435260674] [2023-11-12 00:52:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435260674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:41,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:41,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:52:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041287781] [2023-11-12 00:52:41,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:41,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:52:41,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:52:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:52:41,851 INFO L87 Difference]: Start difference. First operand 5339 states and 7297 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 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) [2023-11-12 00:52:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:42,901 INFO L93 Difference]: Finished difference Result 19626 states and 27358 transitions. [2023-11-12 00:52:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:52:42,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 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 65 [2023-11-12 00:52:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:42,990 INFO L225 Difference]: With dead ends: 19626 [2023-11-12 00:52:42,990 INFO L226 Difference]: Without dead ends: 18351 [2023-11-12 00:52:42,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:52:42,999 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 3969 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3969 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:43,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3969 Valid, 854 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:52:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2023-11-12 00:52:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 5363. [2023-11-12 00:52:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5361 states have (on average 1.3670956911024064) internal successors, (7329), 5362 states have internal predecessors, (7329), 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) [2023-11-12 00:52:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 7329 transitions. [2023-11-12 00:52:43,261 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 7329 transitions. Word has length 65 [2023-11-12 00:52:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:43,261 INFO L495 AbstractCegarLoop]: Abstraction has 5363 states and 7329 transitions. [2023-11-12 00:52:43,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 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) [2023-11-12 00:52:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 7329 transitions. [2023-11-12 00:52:43,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:52:43,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:43,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:43,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:52:43,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1311593556, now seen corresponding path program 1 times [2023-11-12 00:52:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:43,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071467231] [2023-11-12 00:52:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:43,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:43,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071467231] [2023-11-12 00:52:43,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071467231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:43,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:43,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:52:43,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635828291] [2023-11-12 00:52:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:43,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:52:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:52:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:52:43,439 INFO L87 Difference]: Start difference. First operand 5363 states and 7329 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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) [2023-11-12 00:52:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:44,456 INFO L93 Difference]: Finished difference Result 19402 states and 26665 transitions. [2023-11-12 00:52:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:52:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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 66 [2023-11-12 00:52:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:44,494 INFO L225 Difference]: With dead ends: 19402 [2023-11-12 00:52:44,494 INFO L226 Difference]: Without dead ends: 17278 [2023-11-12 00:52:44,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:52:44,503 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 3571 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3571 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:44,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3571 Valid, 784 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:52:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17278 states. [2023-11-12 00:52:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17278 to 5391. [2023-11-12 00:52:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5391 states, 5389 states have (on average 1.3666728521061422) internal successors, (7365), 5390 states have internal predecessors, (7365), 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) [2023-11-12 00:52:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5391 states to 5391 states and 7365 transitions. [2023-11-12 00:52:44,746 INFO L78 Accepts]: Start accepts. Automaton has 5391 states and 7365 transitions. Word has length 66 [2023-11-12 00:52:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:44,747 INFO L495 AbstractCegarLoop]: Abstraction has 5391 states and 7365 transitions. [2023-11-12 00:52:44,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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) [2023-11-12 00:52:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5391 states and 7365 transitions. [2023-11-12 00:52:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:52:44,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:44,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:52:44,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:44,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1448174587, now seen corresponding path program 1 times [2023-11-12 00:52:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:44,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128566660] [2023-11-12 00:52:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:44,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128566660] [2023-11-12 00:52:44,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128566660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:44,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:44,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:52:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986858410] [2023-11-12 00:52:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:44,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:52:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:52:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:52:44,867 INFO L87 Difference]: Start difference. First operand 5391 states and 7365 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2023-11-12 00:52:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:45,371 INFO L93 Difference]: Finished difference Result 14126 states and 19386 transitions. [2023-11-12 00:52:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2023-11-12 00:52:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:45,388 INFO L225 Difference]: With dead ends: 14126 [2023-11-12 00:52:45,388 INFO L226 Difference]: Without dead ends: 9042 [2023-11-12 00:52:45,395 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 [2023-11-12 00:52:45,396 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1815 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:45,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1815 Valid, 393 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:52:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2023-11-12 00:52:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 9038. [2023-11-12 00:52:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9036 states have (on average 1.3602257636122177) internal successors, (12291), 9037 states have internal predecessors, (12291), 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) [2023-11-12 00:52:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 12291 transitions. [2023-11-12 00:52:45,552 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 12291 transitions. Word has length 66 [2023-11-12 00:52:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:45,552 INFO L495 AbstractCegarLoop]: Abstraction has 9038 states and 12291 transitions. [2023-11-12 00:52:45,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2023-11-12 00:52:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 12291 transitions. [2023-11-12 00:52:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-12 00:52:45,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:45,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:45,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:52:45,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:45,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 251496623, now seen corresponding path program 1 times [2023-11-12 00:52:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:45,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921972713] [2023-11-12 00:52:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:45,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921972713] [2023-11-12 00:52:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921972713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:45,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:52:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977343149] [2023-11-12 00:52:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:52:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:52:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:52:45,738 INFO L87 Difference]: Start difference. First operand 9038 states and 12291 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2023-11-12 00:52:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:46,712 INFO L93 Difference]: Finished difference Result 43102 states and 59446 transitions. [2023-11-12 00:52:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:52:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 67 [2023-11-12 00:52:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:46,785 INFO L225 Difference]: With dead ends: 43102 [2023-11-12 00:52:46,785 INFO L226 Difference]: Without dead ends: 39380 [2023-11-12 00:52:46,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:52:46,798 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 3534 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3534 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:46,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3534 Valid, 845 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:52:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39380 states. [2023-11-12 00:52:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39380 to 9135. [2023-11-12 00:52:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9135 states, 9133 states have (on average 1.3599036461184715) internal successors, (12420), 9134 states have internal predecessors, (12420), 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) [2023-11-12 00:52:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9135 states to 9135 states and 12420 transitions. [2023-11-12 00:52:47,265 INFO L78 Accepts]: Start accepts. Automaton has 9135 states and 12420 transitions. Word has length 67 [2023-11-12 00:52:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:47,266 INFO L495 AbstractCegarLoop]: Abstraction has 9135 states and 12420 transitions. [2023-11-12 00:52:47,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2023-11-12 00:52:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9135 states and 12420 transitions. [2023-11-12 00:52:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:52:47,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:47,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:47,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:52:47,275 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:47,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash 288337870, now seen corresponding path program 1 times [2023-11-12 00:52:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780577191] [2023-11-12 00:52:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:47,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780577191] [2023-11-12 00:52:47,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780577191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:47,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:47,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:52:47,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709636923] [2023-11-12 00:52:47,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:47,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:52:47,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:47,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:52:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:52:47,679 INFO L87 Difference]: Start difference. First operand 9135 states and 12420 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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) [2023-11-12 00:52:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:49,075 INFO L93 Difference]: Finished difference Result 29357 states and 40108 transitions. [2023-11-12 00:52:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:52:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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 68 [2023-11-12 00:52:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:49,124 INFO L225 Difference]: With dead ends: 29357 [2023-11-12 00:52:49,125 INFO L226 Difference]: Without dead ends: 22403 [2023-11-12 00:52:49,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:52:49,139 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1905 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:49,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1905 Valid, 1598 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:52:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22403 states. [2023-11-12 00:52:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22403 to 9131. [2023-11-12 00:52:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9129 states have (on average 1.3596231788804907) internal successors, (12412), 9130 states have internal predecessors, (12412), 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) [2023-11-12 00:52:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 12412 transitions. [2023-11-12 00:52:49,490 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 12412 transitions. Word has length 68 [2023-11-12 00:52:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:49,490 INFO L495 AbstractCegarLoop]: Abstraction has 9131 states and 12412 transitions. [2023-11-12 00:52:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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) [2023-11-12 00:52:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 12412 transitions. [2023-11-12 00:52:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:52:49,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:49,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:52:49,499 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:49,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1656089935, now seen corresponding path program 1 times [2023-11-12 00:52:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:49,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077064331] [2023-11-12 00:52:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:49,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:50,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:50,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077064331] [2023-11-12 00:52:50,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077064331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:50,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:50,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:52:50,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713427323] [2023-11-12 00:52:50,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:50,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:52:50,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:52:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:52:50,050 INFO L87 Difference]: Start difference. First operand 9131 states and 12412 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2023-11-12 00:52:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:52,366 INFO L93 Difference]: Finished difference Result 30948 states and 41882 transitions. [2023-11-12 00:52:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 00:52:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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 68 [2023-11-12 00:52:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:52,453 INFO L225 Difference]: With dead ends: 30948 [2023-11-12 00:52:52,453 INFO L226 Difference]: Without dead ends: 28617 [2023-11-12 00:52:52,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:52:52,460 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 2457 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:52,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 2149 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-12 00:52:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28617 states. [2023-11-12 00:52:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28617 to 9131. [2023-11-12 00:52:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9129 states have (on average 1.3594040968342644) internal successors, (12410), 9130 states have internal predecessors, (12410), 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) [2023-11-12 00:52:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 12410 transitions. [2023-11-12 00:52:52,735 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 12410 transitions. Word has length 68 [2023-11-12 00:52:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:52,736 INFO L495 AbstractCegarLoop]: Abstraction has 9131 states and 12410 transitions. [2023-11-12 00:52:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2023-11-12 00:52:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 12410 transitions. [2023-11-12 00:52:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:52:52,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:52,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:52:52,745 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:52,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -583929423, now seen corresponding path program 1 times [2023-11-12 00:52:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207220914] [2023-11-12 00:52:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:53,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:53,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207220914] [2023-11-12 00:52:53,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207220914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:53,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:53,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:52:53,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585239499] [2023-11-12 00:52:53,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:53,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:52:53,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:52:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:52:53,037 INFO L87 Difference]: Start difference. First operand 9131 states and 12410 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 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) [2023-11-12 00:52:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:54,361 INFO L93 Difference]: Finished difference Result 27651 states and 37795 transitions. [2023-11-12 00:52:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:52:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 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 69 [2023-11-12 00:52:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:54,387 INFO L225 Difference]: With dead ends: 27651 [2023-11-12 00:52:54,388 INFO L226 Difference]: Without dead ends: 20663 [2023-11-12 00:52:54,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:52:54,400 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 2210 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2210 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:54,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2210 Valid, 1586 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:52:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20663 states. [2023-11-12 00:52:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20663 to 9111. [2023-11-12 00:52:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9109 states have (on average 1.3588758370842025) internal successors, (12378), 9110 states have internal predecessors, (12378), 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) [2023-11-12 00:52:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 12378 transitions. [2023-11-12 00:52:54,725 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 12378 transitions. Word has length 69 [2023-11-12 00:52:54,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:54,725 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 12378 transitions. [2023-11-12 00:52:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 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) [2023-11-12 00:52:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 12378 transitions. [2023-11-12 00:52:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:52:54,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:54,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:54,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:52:54,734 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:54,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash -843555950, now seen corresponding path program 1 times [2023-11-12 00:52:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:54,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426176724] [2023-11-12 00:52:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:54,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:55,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:55,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426176724] [2023-11-12 00:52:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426176724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-12 00:52:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854457738] [2023-11-12 00:52:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:52:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:52:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:52:55,743 INFO L87 Difference]: Start difference. First operand 9111 states and 12378 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 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) [2023-11-12 00:52:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:59,382 INFO L93 Difference]: Finished difference Result 73299 states and 100511 transitions. [2023-11-12 00:52:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-12 00:52:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 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 69 [2023-11-12 00:52:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:59,471 INFO L225 Difference]: With dead ends: 73299 [2023-11-12 00:52:59,471 INFO L226 Difference]: Without dead ends: 66147 [2023-11-12 00:52:59,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 00:52:59,489 INFO L413 NwaCegarLoop]: 1089 mSDtfsCounter, 4751 mSDsluCounter, 7493 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 8582 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:59,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4751 Valid, 8582 Invalid, 1308 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 00:52:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66147 states. [2023-11-12 00:52:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66147 to 8901. [2023-11-12 00:52:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8901 states, 8899 states have (on average 1.3601528261602427) internal successors, (12104), 8900 states have internal predecessors, (12104), 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) [2023-11-12 00:52:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8901 states to 8901 states and 12104 transitions. [2023-11-12 00:52:59,906 INFO L78 Accepts]: Start accepts. Automaton has 8901 states and 12104 transitions. Word has length 69 [2023-11-12 00:52:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:59,907 INFO L495 AbstractCegarLoop]: Abstraction has 8901 states and 12104 transitions. [2023-11-12 00:52:59,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 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) [2023-11-12 00:52:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 8901 states and 12104 transitions. [2023-11-12 00:52:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:52:59,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:59,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:59,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 00:52:59,915 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:59,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -48339803, now seen corresponding path program 1 times [2023-11-12 00:52:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747588795] [2023-11-12 00:52:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:00,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:00,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747588795] [2023-11-12 00:53:00,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747588795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:00,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:00,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:53:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085503666] [2023-11-12 00:53:00,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:53:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:53:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:53:00,076 INFO L87 Difference]: Start difference. First operand 8901 states and 12104 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 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) [2023-11-12 00:53:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:01,000 INFO L93 Difference]: Finished difference Result 37803 states and 51998 transitions. [2023-11-12 00:53:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:53:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 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 69 [2023-11-12 00:53:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:01,038 INFO L225 Difference]: With dead ends: 37803 [2023-11-12 00:53:01,040 INFO L226 Difference]: Without dead ends: 34245 [2023-11-12 00:53:01,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:53:01,065 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2506 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2506 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:01,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2506 Valid, 874 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:53:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34245 states. [2023-11-12 00:53:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34245 to 8972. [2023-11-12 00:53:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8972 states, 8970 states have (on average 1.3604236343366778) internal successors, (12203), 8971 states have internal predecessors, (12203), 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) [2023-11-12 00:53:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 12203 transitions. [2023-11-12 00:53:01,400 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 12203 transitions. Word has length 69 [2023-11-12 00:53:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:01,400 INFO L495 AbstractCegarLoop]: Abstraction has 8972 states and 12203 transitions. [2023-11-12 00:53:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 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) [2023-11-12 00:53:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 12203 transitions. [2023-11-12 00:53:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:53:01,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:01,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:01,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 00:53:01,409 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:01,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash 764464694, now seen corresponding path program 1 times [2023-11-12 00:53:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:01,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272394947] [2023-11-12 00:53:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:02,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:02,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272394947] [2023-11-12 00:53:02,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272394947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:02,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:02,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 00:53:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804629779] [2023-11-12 00:53:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:53:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:53:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:53:02,048 INFO L87 Difference]: Start difference. First operand 8972 states and 12203 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 states have internal predecessors, (69), 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) [2023-11-12 00:53:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:03,014 INFO L93 Difference]: Finished difference Result 41229 states and 56768 transitions. [2023-11-12 00:53:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:53:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 states have internal predecessors, (69), 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 69 [2023-11-12 00:53:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:03,050 INFO L225 Difference]: With dead ends: 41229 [2023-11-12 00:53:03,051 INFO L226 Difference]: Without dead ends: 34151 [2023-11-12 00:53:03,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:53:03,063 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 2416 mSDsluCounter, 2798 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2416 SdHoareTripleChecker+Valid, 3550 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:03,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2416 Valid, 3550 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:53:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34151 states. [2023-11-12 00:53:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34151 to 8832. [2023-11-12 00:53:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8830 states have (on average 1.3613816534541336) internal successors, (12021), 8831 states have internal predecessors, (12021), 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) [2023-11-12 00:53:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 12021 transitions. [2023-11-12 00:53:03,340 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 12021 transitions. Word has length 69 [2023-11-12 00:53:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:03,340 INFO L495 AbstractCegarLoop]: Abstraction has 8832 states and 12021 transitions. [2023-11-12 00:53:03,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 states have internal predecessors, (69), 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) [2023-11-12 00:53:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 12021 transitions. [2023-11-12 00:53:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:53:03,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:03,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:03,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 00:53:03,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:03,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1937241439, now seen corresponding path program 1 times [2023-11-12 00:53:03,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:03,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893374366] [2023-11-12 00:53:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:03,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:04,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:04,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893374366] [2023-11-12 00:53:04,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893374366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:04,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:04,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-12 00:53:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108793878] [2023-11-12 00:53:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:53:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:53:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:53:04,232 INFO L87 Difference]: Start difference. First operand 8832 states and 12021 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 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) [2023-11-12 00:53:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:08,055 INFO L93 Difference]: Finished difference Result 64191 states and 88128 transitions. [2023-11-12 00:53:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 00:53:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 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 70 [2023-11-12 00:53:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:08,125 INFO L225 Difference]: With dead ends: 64191 [2023-11-12 00:53:08,125 INFO L226 Difference]: Without dead ends: 57181 [2023-11-12 00:53:08,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 00:53:08,143 INFO L413 NwaCegarLoop]: 1220 mSDtfsCounter, 3842 mSDsluCounter, 8256 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3842 SdHoareTripleChecker+Valid, 9476 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:08,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3842 Valid, 9476 Invalid, 1529 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:53:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57181 states. [2023-11-12 00:53:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57181 to 8768. [2023-11-12 00:53:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8768 states, 8767 states have (on average 1.3606706969316755) internal successors, (11929), 8767 states have internal predecessors, (11929), 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) [2023-11-12 00:53:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8768 states to 8768 states and 11929 transitions. [2023-11-12 00:53:08,453 INFO L78 Accepts]: Start accepts. Automaton has 8768 states and 11929 transitions. Word has length 70 [2023-11-12 00:53:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:08,453 INFO L495 AbstractCegarLoop]: Abstraction has 8768 states and 11929 transitions. [2023-11-12 00:53:08,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 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) [2023-11-12 00:53:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8768 states and 11929 transitions. [2023-11-12 00:53:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:53:08,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:08,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:08,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 00:53:08,460 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:08,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash -615241948, now seen corresponding path program 1 times [2023-11-12 00:53:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482789418] [2023-11-12 00:53:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:08,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:08,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482789418] [2023-11-12 00:53:08,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482789418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:08,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:08,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:53:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351758336] [2023-11-12 00:53:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:08,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:53:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:53:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:53:08,608 INFO L87 Difference]: Start difference. First operand 8768 states and 11929 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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) [2023-11-12 00:53:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:09,472 INFO L93 Difference]: Finished difference Result 42355 states and 58475 transitions. [2023-11-12 00:53:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:53:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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 70 [2023-11-12 00:53:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:09,511 INFO L225 Difference]: With dead ends: 42355 [2023-11-12 00:53:09,511 INFO L226 Difference]: Without dead ends: 38751 [2023-11-12 00:53:09,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:53:09,581 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 2500 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2500 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:09,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2500 Valid, 841 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:53:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38751 states. [2023-11-12 00:53:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38751 to 8798. [2023-11-12 00:53:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8798 states, 8797 states have (on average 1.3605774695919064) internal successors, (11969), 8797 states have internal predecessors, (11969), 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) [2023-11-12 00:53:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 11969 transitions. [2023-11-12 00:53:09,830 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 11969 transitions. Word has length 70 [2023-11-12 00:53:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:09,831 INFO L495 AbstractCegarLoop]: Abstraction has 8798 states and 11969 transitions. [2023-11-12 00:53:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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) [2023-11-12 00:53:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 11969 transitions. [2023-11-12 00:53:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:53:09,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:09,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:09,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 00:53:09,837 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:09,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2007440010, now seen corresponding path program 1 times [2023-11-12 00:53:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:09,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523172846] [2023-11-12 00:53:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:10,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523172846] [2023-11-12 00:53:10,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523172846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:10,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:53:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118781850] [2023-11-12 00:53:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:10,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:53:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:53:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:53:10,173 INFO L87 Difference]: Start difference. First operand 8798 states and 11969 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 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) [2023-11-12 00:53:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:11,584 INFO L93 Difference]: Finished difference Result 35055 states and 47976 transitions. [2023-11-12 00:53:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:53:11,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 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 70 [2023-11-12 00:53:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:11,607 INFO L225 Difference]: With dead ends: 35055 [2023-11-12 00:53:11,607 INFO L226 Difference]: Without dead ends: 27847 [2023-11-12 00:53:11,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:53:11,616 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 1671 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:11,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1671 Valid, 2034 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:53:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27847 states. [2023-11-12 00:53:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27847 to 8661. [2023-11-12 00:53:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 8660 states have (on average 1.3603926096997692) internal successors, (11781), 8660 states have internal predecessors, (11781), 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) [2023-11-12 00:53:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 11781 transitions. [2023-11-12 00:53:11,802 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 11781 transitions. Word has length 70 [2023-11-12 00:53:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:11,803 INFO L495 AbstractCegarLoop]: Abstraction has 8661 states and 11781 transitions. [2023-11-12 00:53:11,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 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) [2023-11-12 00:53:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 11781 transitions. [2023-11-12 00:53:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:53:11,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:11,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:11,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-12 00:53:11,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:11,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1894019455, now seen corresponding path program 1 times [2023-11-12 00:53:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:11,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915856705] [2023-11-12 00:53:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:12,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:12,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915856705] [2023-11-12 00:53:12,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915856705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:12,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:12,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 00:53:12,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496668218] [2023-11-12 00:53:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:12,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:53:12,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:53:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:53:12,410 INFO L87 Difference]: Start difference. First operand 8661 states and 11781 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 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)