./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:05,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:05,749 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:12:05,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:05,757 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:05,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:05,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:05,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:05,791 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:05,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:05,792 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:05,793 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:05,794 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:05,795 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:05,795 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:05,796 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:05,797 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:05,798 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:05,799 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:05,799 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:05,800 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:05,801 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:05,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:05,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:05,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:12:05,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:05,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:12:05,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:05,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:05,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:05,807 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:05,808 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:12:05,808 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:05,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:05,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:05,809 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:05,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:05,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:05,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:05,811 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:05,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:05,812 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:05,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:05,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:05,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:05,813 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:05,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:05,814 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_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81fc918e1fab83089d488e981f8e2fc461bd57864199cdfbd6916c01a7d86fab [2023-11-23 21:12:06,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:06,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:06,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:06,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:06,188 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:06,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-23 21:12:09,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:09,927 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:09,928 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-23 21:12:09,943 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/data/e09e38748/644320b11896483a9be3f794337be4d1/FLAGaea0a93a2 [2023-11-23 21:12:09,961 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/data/e09e38748/644320b11896483a9be3f794337be4d1 [2023-11-23 21:12:09,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:09,967 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:09,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:09,969 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:09,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:09,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:09" (1/1) ... [2023-11-23 21:12:09,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61deb74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:09, skipping insertion in model container [2023-11-23 21:12:09,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:09" (1/1) ... [2023-11-23 21:12:10,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:10,348 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_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2023-11-23 21:12:10,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:10,404 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:10,468 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_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2023-11-23 21:12:10,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:10,516 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:10,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10 WrapperNode [2023-11-23 21:12:10,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:10,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:10,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:10,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:10,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,588 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 606 [2023-11-23 21:12:10,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:10,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:10,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:10,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:10,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,604 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,617 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,623 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:10,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:10,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:10,638 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:10,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (1/1) ... [2023-11-23 21:12:10,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:10,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:10,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:10,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:10,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:10,861 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:10,863 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:11,607 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:12,065 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:12,065 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:12:12,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:12 BoogieIcfgContainer [2023-11-23 21:12:12,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:12,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:12,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:12,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:12,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:09" (1/3) ... [2023-11-23 21:12:12,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628115c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:12, skipping insertion in model container [2023-11-23 21:12:12,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:10" (2/3) ... [2023-11-23 21:12:12,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628115c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:12, skipping insertion in model container [2023-11-23 21:12:12,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:12" (3/3) ... [2023-11-23 21:12:12,086 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-23 21:12:12,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:12,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:12:12,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:12,190 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;@639d8f9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:12,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:12:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 79 states have (on average 1.759493670886076) internal successors, (139), 86 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:12:12,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:12,209 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] [2023-11-23 21:12:12,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:12,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash -502354359, now seen corresponding path program 1 times [2023-11-23 21:12:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:12,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278596344] [2023-11-23 21:12:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:12,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278596344] [2023-11-23 21:12:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278596344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:12,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122980579] [2023-11-23 21:12:12,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:12,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:12,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:12,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:12,898 INFO L87 Difference]: Start difference. First operand has 87 states, 79 states have (on average 1.759493670886076) internal successors, (139), 86 states have internal predecessors, (139), 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 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:13,013 INFO L93 Difference]: Finished difference Result 203 states and 308 transitions. [2023-11-23 21:12:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 32 [2023-11-23 21:12:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:13,027 INFO L225 Difference]: With dead ends: 203 [2023-11-23 21:12:13,028 INFO L226 Difference]: Without dead ends: 123 [2023-11-23 21:12:13,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,036 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 93 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:13,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 301 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-23 21:12:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-11-23 21:12:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.4333333333333333) internal successors, (172), 120 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 172 transitions. [2023-11-23 21:12:13,115 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 172 transitions. Word has length 32 [2023-11-23 21:12:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:13,117 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 172 transitions. [2023-11-23 21:12:13,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 172 transitions. [2023-11-23 21:12:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:12:13,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:13,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:13,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:13,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1571247824, now seen corresponding path program 1 times [2023-11-23 21:12:13,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:13,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612878746] [2023-11-23 21:12:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:13,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612878746] [2023-11-23 21:12:13,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612878746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:13,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:13,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042298706] [2023-11-23 21:12:13,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:13,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:13,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,371 INFO L87 Difference]: Start difference. First operand 121 states and 172 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:13,437 INFO L93 Difference]: Finished difference Result 276 states and 407 transitions. [2023-11-23 21:12:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:13,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-23 21:12:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:13,441 INFO L225 Difference]: With dead ends: 276 [2023-11-23 21:12:13,441 INFO L226 Difference]: Without dead ends: 178 [2023-11-23 21:12:13,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,444 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:13,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 178 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-23 21:12:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2023-11-23 21:12:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.4457142857142857) internal successors, (253), 175 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 253 transitions. [2023-11-23 21:12:13,486 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 253 transitions. Word has length 34 [2023-11-23 21:12:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:13,487 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 253 transitions. [2023-11-23 21:12:13,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 253 transitions. [2023-11-23 21:12:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:12:13,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:13,491 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] [2023-11-23 21:12:13,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:13,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:13,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1753091651, now seen corresponding path program 1 times [2023-11-23 21:12:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604726985] [2023-11-23 21:12:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:13,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604726985] [2023-11-23 21:12:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604726985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:13,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:13,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:13,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423346999] [2023-11-23 21:12:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:13,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,632 INFO L87 Difference]: Start difference. First operand 176 states and 253 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:13,702 INFO L93 Difference]: Finished difference Result 442 states and 652 transitions. [2023-11-23 21:12:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:13,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2023-11-23 21:12:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:13,710 INFO L225 Difference]: With dead ends: 442 [2023-11-23 21:12:13,711 INFO L226 Difference]: Without dead ends: 291 [2023-11-23 21:12:13,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,717 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 77 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:13,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 221 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-23 21:12:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2023-11-23 21:12:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4583333333333333) internal successors, (420), 288 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 420 transitions. [2023-11-23 21:12:13,766 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 420 transitions. Word has length 36 [2023-11-23 21:12:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:13,767 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 420 transitions. [2023-11-23 21:12:13,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 420 transitions. [2023-11-23 21:12:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:12:13,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:13,769 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] [2023-11-23 21:12:13,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:12:13,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:13,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:13,771 INFO L85 PathProgramCache]: Analyzing trace with hash -242590387, now seen corresponding path program 1 times [2023-11-23 21:12:13,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:13,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050061801] [2023-11-23 21:12:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:13,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:13,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050061801] [2023-11-23 21:12:13,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050061801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:13,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:13,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:13,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130983972] [2023-11-23 21:12:13,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:13,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,879 INFO L87 Difference]: Start difference. First operand 289 states and 420 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:13,918 INFO L93 Difference]: Finished difference Result 717 states and 1062 transitions. [2023-11-23 21:12:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:13,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2023-11-23 21:12:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:13,923 INFO L225 Difference]: With dead ends: 717 [2023-11-23 21:12:13,923 INFO L226 Difference]: Without dead ends: 453 [2023-11-23 21:12:13,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:13,927 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:13,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-23 21:12:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2023-11-23 21:12:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.4733333333333334) internal successors, (663), 450 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 663 transitions. [2023-11-23 21:12:13,958 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 663 transitions. Word has length 38 [2023-11-23 21:12:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:13,958 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 663 transitions. [2023-11-23 21:12:13,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 663 transitions. [2023-11-23 21:12:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:12:13,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:13,962 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] [2023-11-23 21:12:13,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:12:13,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:13,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1162688320, now seen corresponding path program 1 times [2023-11-23 21:12:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:13,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554251155] [2023-11-23 21:12:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:13,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:14,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554251155] [2023-11-23 21:12:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554251155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:14,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:14,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:14,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914916777] [2023-11-23 21:12:14,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:14,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:14,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:14,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:14,061 INFO L87 Difference]: Start difference. First operand 451 states and 663 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:14,102 INFO L93 Difference]: Finished difference Result 1169 states and 1730 transitions. [2023-11-23 21:12:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2023-11-23 21:12:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:14,110 INFO L225 Difference]: With dead ends: 1169 [2023-11-23 21:12:14,110 INFO L226 Difference]: Without dead ends: 756 [2023-11-23 21:12:14,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:14,119 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 72 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:14,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 202 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-11-23 21:12:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 754. [2023-11-23 21:12:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.4621513944223108) internal successors, (1101), 753 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1101 transitions. [2023-11-23 21:12:14,146 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1101 transitions. Word has length 40 [2023-11-23 21:12:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:14,146 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1101 transitions. [2023-11-23 21:12:14,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1101 transitions. [2023-11-23 21:12:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:12:14,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:14,150 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] [2023-11-23 21:12:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:12:14,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:14,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1626278374, now seen corresponding path program 1 times [2023-11-23 21:12:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467205264] [2023-11-23 21:12:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:14,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467205264] [2023-11-23 21:12:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467205264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:14,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:14,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764922563] [2023-11-23 21:12:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:14,251 INFO L87 Difference]: Start difference. First operand 754 states and 1101 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:14,294 INFO L93 Difference]: Finished difference Result 1896 states and 2796 transitions. [2023-11-23 21:12:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2023-11-23 21:12:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:14,302 INFO L225 Difference]: With dead ends: 1896 [2023-11-23 21:12:14,302 INFO L226 Difference]: Without dead ends: 1180 [2023-11-23 21:12:14,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:14,305 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 71 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:14,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 197 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2023-11-23 21:12:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1178. [2023-11-23 21:12:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.4689889549702633) internal successors, (1729), 1177 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1729 transitions. [2023-11-23 21:12:14,340 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1729 transitions. Word has length 42 [2023-11-23 21:12:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:14,340 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1729 transitions. [2023-11-23 21:12:14,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1729 transitions. [2023-11-23 21:12:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:12:14,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:14,342 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] [2023-11-23 21:12:14,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:12:14,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:14,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 824006727, now seen corresponding path program 1 times [2023-11-23 21:12:14,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:14,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523115174] [2023-11-23 21:12:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:14,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:14,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523115174] [2023-11-23 21:12:14,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523115174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:14,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:14,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:14,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640141878] [2023-11-23 21:12:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:14,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:14,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:14,465 INFO L87 Difference]: Start difference. First operand 1178 states and 1729 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:14,683 INFO L93 Difference]: Finished difference Result 3006 states and 4435 transitions. [2023-11-23 21:12:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:12:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 44 [2023-11-23 21:12:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:14,696 INFO L225 Difference]: With dead ends: 3006 [2023-11-23 21:12:14,696 INFO L226 Difference]: Without dead ends: 1861 [2023-11-23 21:12:14,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:12:14,699 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 439 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:14,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 787 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2023-11-23 21:12:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1835. [2023-11-23 21:12:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 1.474372955288986) internal successors, (2704), 1834 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2704 transitions. [2023-11-23 21:12:14,759 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2704 transitions. Word has length 44 [2023-11-23 21:12:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:14,759 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 2704 transitions. [2023-11-23 21:12:14,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2704 transitions. [2023-11-23 21:12:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:12:14,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:14,761 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] [2023-11-23 21:12:14,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:12:14,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:14,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash -288099457, now seen corresponding path program 1 times [2023-11-23 21:12:14,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:14,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065262546] [2023-11-23 21:12:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:14,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:14,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:14,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065262546] [2023-11-23 21:12:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065262546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:14,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:14,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:14,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845483984] [2023-11-23 21:12:14,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:14,884 INFO L87 Difference]: Start difference. First operand 1835 states and 2704 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:14,980 INFO L93 Difference]: Finished difference Result 3621 states and 5346 transitions. [2023-11-23 21:12:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 45 [2023-11-23 21:12:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:14,994 INFO L225 Difference]: With dead ends: 3621 [2023-11-23 21:12:14,994 INFO L226 Difference]: Without dead ends: 1837 [2023-11-23 21:12:14,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:14,997 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 145 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:14,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 279 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2023-11-23 21:12:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1832. [2023-11-23 21:12:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 1.4685963954123429) internal successors, (2689), 1831 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2689 transitions. [2023-11-23 21:12:15,083 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2689 transitions. Word has length 45 [2023-11-23 21:12:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:15,084 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 2689 transitions. [2023-11-23 21:12:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2689 transitions. [2023-11-23 21:12:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:12:15,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:15,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:12:15,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:15,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash -682424652, now seen corresponding path program 1 times [2023-11-23 21:12:15,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:15,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292482391] [2023-11-23 21:12:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:15,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:15,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292482391] [2023-11-23 21:12:15,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292482391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:15,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:15,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277955208] [2023-11-23 21:12:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:15,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:15,524 INFO L87 Difference]: Start difference. First operand 1832 states and 2689 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:15,646 INFO L93 Difference]: Finished difference Result 3022 states and 4386 transitions. [2023-11-23 21:12:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:12:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-23 21:12:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:15,669 INFO L225 Difference]: With dead ends: 3022 [2023-11-23 21:12:15,669 INFO L226 Difference]: Without dead ends: 3020 [2023-11-23 21:12:15,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:12:15,679 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 148 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:15,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 552 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2023-11-23 21:12:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 1876. [2023-11-23 21:12:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 1.4453333333333334) internal successors, (2710), 1875 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2710 transitions. [2023-11-23 21:12:15,754 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2710 transitions. Word has length 53 [2023-11-23 21:12:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:15,755 INFO L495 AbstractCegarLoop]: Abstraction has 1876 states and 2710 transitions. [2023-11-23 21:12:15,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2710 transitions. [2023-11-23 21:12:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:12:15,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:15,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:15,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:12:15,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:15,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1768573819, now seen corresponding path program 1 times [2023-11-23 21:12:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:15,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066714866] [2023-11-23 21:12:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:12:17,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066714866] [2023-11-23 21:12:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066714866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507251409] [2023-11-23 21:12:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:17,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:17,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:17,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7974e4-7f5c-4a5d-8649-e80d04f760ad/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:12:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:18,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:12:18,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:12:19,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:12:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:12:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507251409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:12:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725643313] [2023-11-23 21:12:24,841 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 21:12:24,841 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:12:24,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:12:24,855 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:12:24,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:12:26,012 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-11-23 21:12:38,599 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjunctions. This might take some time...