./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6fe2492e6625b8197ec02c92b2531b1f71f91a1bb5aa875b34eccb40967800d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:44:42,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:44:42,583 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:44:42,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:44:42,593 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:44:42,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:44:42,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:44:42,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:44:42,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:44:42,644 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:44:42,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:44:42,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:44:42,646 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:44:42,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:44:42,649 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:44:42,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:44:42,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:44:42,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:44:42,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:44:42,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:44:42,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:44:42,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:44:42,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:44:42,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:44:42,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:44:42,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:44:42,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:44:42,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:44:42,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:44:42,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:44:42,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:44:42,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:42,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:44:42,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:44:42,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:44:42,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:44:42,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:44:42,662 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:44:42,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:44:42,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:44:42,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:44:42,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:44:42,663 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6fe2492e6625b8197ec02c92b2531b1f71f91a1bb5aa875b34eccb40967800d [2023-11-26 11:44:42,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:44:43,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:44:43,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:44:43,019 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:44:43,019 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:44:43,021 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem18_label54.c [2023-11-26 11:44:46,170 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:44:46,703 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:44:46,704 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/sv-benchmarks/c/eca-rers2012/Problem18_label54.c [2023-11-26 11:44:46,735 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/data/8d05456be/d70766f2b63a43b8a111714951ead713/FLAGef015072e [2023-11-26 11:44:46,753 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/data/8d05456be/d70766f2b63a43b8a111714951ead713 [2023-11-26 11:44:46,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:44:46,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:44:46,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:46,765 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:44:46,770 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:44:46,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:46" (1/1) ... [2023-11-26 11:44:46,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29fb9093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:46, skipping insertion in model container [2023-11-26 11:44:46,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:46" (1/1) ... [2023-11-26 11:44:46,939 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:44:47,225 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_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/sv-benchmarks/c/eca-rers2012/Problem18_label54.c[3783,3796] [2023-11-26 11:44:48,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:48,380 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:44:48,416 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_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/sv-benchmarks/c/eca-rers2012/Problem18_label54.c[3783,3796] [2023-11-26 11:44:48,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:48,855 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:44:48,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48 WrapperNode [2023-11-26 11:44:48,856 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:48,857 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:48,857 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:44:48,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:44:48,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:48,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,217 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4133 [2023-11-26 11:44:49,218 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:49,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:44:49,220 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:44:49,220 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:44:49,233 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,261 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,389 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:44:49,390 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,572 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:44:49,643 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:44:49,643 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:44:49,644 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:44:49,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (1/1) ... [2023-11-26 11:44:49,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:49,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:44:49,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a2db9d4-3e1c-47a8-97cd-790fe6e19748/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:44:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:44:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:44:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:44:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:44:49,822 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:44:49,825 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:44:54,566 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:44:54,682 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:44:54,684 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:44:54,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:54 BoogieIcfgContainer [2023-11-26 11:44:54,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:44:54,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:44:54,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:44:54,693 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:44:54,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:44:46" (1/3) ... [2023-11-26 11:44:54,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515d9f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:54, skipping insertion in model container [2023-11-26 11:44:54,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:48" (2/3) ... [2023-11-26 11:44:54,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515d9f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:54, skipping insertion in model container [2023-11-26 11:44:54,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:54" (3/3) ... [2023-11-26 11:44:54,699 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label54.c [2023-11-26 11:44:54,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:44:54,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:44:54,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:44:54,835 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=PETRI_NET, 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;@7f59bea7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:44:54,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:44:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 695 states, 693 states have (on average 1.9942279942279941) internal successors, (1382), 694 states have internal predecessors, (1382), 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) [2023-11-26 11:44:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:44:54,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:54,860 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] [2023-11-26 11:44:54,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:54,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash 57125706, now seen corresponding path program 1 times [2023-11-26 11:44:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:54,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550394126] [2023-11-26 11:44:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:55,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:55,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550394126] [2023-11-26 11:44:55,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550394126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:55,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:55,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232166716] [2023-11-26 11:44:55,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:44:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:44:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:44:55,179 INFO L87 Difference]: Start difference. First operand has 695 states, 693 states have (on average 1.9942279942279941) internal successors, (1382), 694 states have internal predecessors, (1382), 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 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-11-26 11:44:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:55,273 INFO L93 Difference]: Finished difference Result 1389 states and 2763 transitions. [2023-11-26 11:44:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:44:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2023-11-26 11:44:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:55,310 INFO L225 Difference]: With dead ends: 1389 [2023-11-26 11:44:55,310 INFO L226 Difference]: Without dead ends: 693 [2023-11-26 11:44:55,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:44:55,324 INFO L413 NwaCegarLoop]: 1317 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:55,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1317 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-26 11:44:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-11-26 11:44:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.903179190751445) internal successors, (1317), 692 states have internal predecessors, (1317), 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) [2023-11-26 11:44:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1317 transitions. [2023-11-26 11:44:55,445 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1317 transitions. Word has length 33 [2023-11-26 11:44:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:55,446 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1317 transitions. [2023-11-26 11:44:55,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-11-26 11:44:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1317 transitions. [2023-11-26 11:44:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:44:55,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:55,448 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] [2023-11-26 11:44:55,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:44:55,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:55,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1644818452, now seen corresponding path program 1 times [2023-11-26 11:44:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:55,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530010381] [2023-11-26 11:44:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530010381] [2023-11-26 11:44:55,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530010381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:55,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:55,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:55,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267446246] [2023-11-26 11:44:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:55,755 INFO L87 Difference]: Start difference. First operand 693 states and 1317 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-11-26 11:44:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:59,936 INFO L93 Difference]: Finished difference Result 2075 states and 3948 transitions. [2023-11-26 11:44:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:59,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2023-11-26 11:44:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:59,954 INFO L225 Difference]: With dead ends: 2075 [2023-11-26 11:44:59,954 INFO L226 Difference]: Without dead ends: 1383 [2023-11-26 11:44:59,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:59,960 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 678 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:59,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 465 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-26 11:44:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2023-11-26 11:45:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1383. [2023-11-26 11:45:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.5781476121562952) internal successors, (2181), 1382 states have internal predecessors, (2181), 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) [2023-11-26 11:45:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2181 transitions. [2023-11-26 11:45:00,027 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2181 transitions. Word has length 33 [2023-11-26 11:45:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:00,028 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2181 transitions. [2023-11-26 11:45:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-11-26 11:45:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2181 transitions. [2023-11-26 11:45:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-26 11:45:00,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:00,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:00,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:45:00,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:00,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1036875069, now seen corresponding path program 1 times [2023-11-26 11:45:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912917786] [2023-11-26 11:45:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:00,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:00,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912917786] [2023-11-26 11:45:00,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912917786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:00,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:00,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:00,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985297713] [2023-11-26 11:45:00,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:00,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:00,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:00,258 INFO L87 Difference]: Start difference. First operand 1383 states and 2181 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2023-11-26 11:45:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:03,974 INFO L93 Difference]: Finished difference Result 4145 states and 6540 transitions. [2023-11-26 11:45:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:03,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 99 [2023-11-26 11:45:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:03,991 INFO L225 Difference]: With dead ends: 4145 [2023-11-26 11:45:03,992 INFO L226 Difference]: Without dead ends: 2763 [2023-11-26 11:45:03,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:03,996 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 713 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:03,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 527 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-26 11:45:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2023-11-26 11:45:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2763. [2023-11-26 11:45:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 1.3482983345401882) internal successors, (3724), 2762 states have internal predecessors, (3724), 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) [2023-11-26 11:45:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 3724 transitions. [2023-11-26 11:45:04,111 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 3724 transitions. Word has length 99 [2023-11-26 11:45:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:04,112 INFO L495 AbstractCegarLoop]: Abstraction has 2763 states and 3724 transitions. [2023-11-26 11:45:04,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2023-11-26 11:45:04,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 3724 transitions. [2023-11-26 11:45:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-26 11:45:04,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:04,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:04,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:45:04,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:04,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1557600459, now seen corresponding path program 1 times [2023-11-26 11:45:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162034516] [2023-11-26 11:45:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162034516] [2023-11-26 11:45:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162034516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:04,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:04,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055377908] [2023-11-26 11:45:04,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:04,354 INFO L87 Difference]: Start difference. First operand 2763 states and 3724 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2023-11-26 11:45:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:08,016 INFO L93 Difference]: Finished difference Result 8285 states and 11169 transitions. [2023-11-26 11:45:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 119 [2023-11-26 11:45:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:08,047 INFO L225 Difference]: With dead ends: 8285 [2023-11-26 11:45:08,047 INFO L226 Difference]: Without dead ends: 5523 [2023-11-26 11:45:08,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:08,052 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 688 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:08,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 433 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-26 11:45:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-26 11:45:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5523. [2023-11-26 11:45:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5523 states, 5522 states have (on average 1.2296269467584209) internal successors, (6790), 5522 states have internal predecessors, (6790), 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) [2023-11-26 11:45:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5523 states to 5523 states and 6790 transitions. [2023-11-26 11:45:08,181 INFO L78 Accepts]: Start accepts. Automaton has 5523 states and 6790 transitions. Word has length 119 [2023-11-26 11:45:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:08,182 INFO L495 AbstractCegarLoop]: Abstraction has 5523 states and 6790 transitions. [2023-11-26 11:45:08,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2023-11-26 11:45:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5523 states and 6790 transitions. [2023-11-26 11:45:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-26 11:45:08,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:08,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:08,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:45:08,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:08,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1805656097, now seen corresponding path program 1 times [2023-11-26 11:45:08,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:08,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945647073] [2023-11-26 11:45:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-26 11:45:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945647073] [2023-11-26 11:45:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945647073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:08,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:08,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721205030] [2023-11-26 11:45:08,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:08,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:08,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:08,991 INFO L87 Difference]: Start difference. First operand 5523 states and 6790 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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) [2023-11-26 11:45:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:13,463 INFO L93 Difference]: Finished difference Result 12425 states and 15031 transitions. [2023-11-26 11:45:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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 220 [2023-11-26 11:45:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:13,499 INFO L225 Difference]: With dead ends: 12425 [2023-11-26 11:45:13,499 INFO L226 Difference]: Without dead ends: 6903 [2023-11-26 11:45:13,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:13,506 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 1873 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4085 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:13,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1873 Valid, 638 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4085 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-26 11:45:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2023-11-26 11:45:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 6903. [2023-11-26 11:45:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6903 states, 6902 states have (on average 1.191538684439293) internal successors, (8224), 6902 states have internal predecessors, (8224), 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) [2023-11-26 11:45:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6903 states to 6903 states and 8224 transitions. [2023-11-26 11:45:13,667 INFO L78 Accepts]: Start accepts. Automaton has 6903 states and 8224 transitions. Word has length 220 [2023-11-26 11:45:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:13,669 INFO L495 AbstractCegarLoop]: Abstraction has 6903 states and 8224 transitions. [2023-11-26 11:45:13,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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) [2023-11-26 11:45:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 6903 states and 8224 transitions. [2023-11-26 11:45:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-11-26 11:45:13,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:13,678 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:45:13,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:13,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1642443336, now seen corresponding path program 1 times [2023-11-26 11:45:13,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:13,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476607647] [2023-11-26 11:45:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:13,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-26 11:45:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476607647] [2023-11-26 11:45:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476607647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974339968] [2023-11-26 11:45:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:14,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:14,490 INFO L87 Difference]: Start difference. First operand 6903 states and 8224 transitions. Second operand has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-11-26 11:45:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:18,110 INFO L93 Difference]: Finished difference Result 15928 states and 18630 transitions. [2023-11-26 11:45:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:18,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 402 [2023-11-26 11:45:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:18,156 INFO L225 Difference]: With dead ends: 15928 [2023-11-26 11:45:18,156 INFO L226 Difference]: Without dead ends: 8973 [2023-11-26 11:45:18,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:18,165 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 529 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:18,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 634 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-26 11:45:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2023-11-26 11:45:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 8973. [2023-11-26 11:45:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 1.1158047258136425) internal successors, (10011), 8972 states have internal predecessors, (10011), 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) [2023-11-26 11:45:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 10011 transitions. [2023-11-26 11:45:18,368 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 10011 transitions. Word has length 402 [2023-11-26 11:45:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:18,375 INFO L495 AbstractCegarLoop]: Abstraction has 8973 states and 10011 transitions. [2023-11-26 11:45:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-11-26 11:45:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 10011 transitions. [2023-11-26 11:45:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2023-11-26 11:45:18,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:18,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:18,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:45:18,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:18,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:18,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1490248099, now seen corresponding path program 1 times [2023-11-26 11:45:18,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:18,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904293503] [2023-11-26 11:45:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:18,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-26 11:45:18,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:18,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904293503] [2023-11-26 11:45:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904293503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:18,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:18,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648901687] [2023-11-26 11:45:18,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:18,979 INFO L87 Difference]: Start difference. First operand 8973 states and 10011 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-11-26 11:45:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:22,142 INFO L93 Difference]: Finished difference Result 21395 states and 24223 transitions. [2023-11-26 11:45:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 418 [2023-11-26 11:45:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:22,179 INFO L225 Difference]: With dead ends: 21395 [2023-11-26 11:45:22,179 INFO L226 Difference]: Without dead ends: 12423 [2023-11-26 11:45:22,191 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 [2023-11-26 11:45:22,192 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 659 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:22,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 1116 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-26 11:45:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12423 states. [2023-11-26 11:45:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12423 to 12423. [2023-11-26 11:45:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12423 states, 12422 states have (on average 1.098212848172597) internal successors, (13642), 12422 states have internal predecessors, (13642), 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) [2023-11-26 11:45:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12423 states to 12423 states and 13642 transitions. [2023-11-26 11:45:22,437 INFO L78 Accepts]: Start accepts. Automaton has 12423 states and 13642 transitions. Word has length 418 [2023-11-26 11:45:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:22,439 INFO L495 AbstractCegarLoop]: Abstraction has 12423 states and 13642 transitions. [2023-11-26 11:45:22,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-11-26 11:45:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 12423 states and 13642 transitions. [2023-11-26 11:45:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-11-26 11:45:22,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:22,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:22,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:45:22,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:22,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:22,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1287540008, now seen corresponding path program 1 times [2023-11-26 11:45:22,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677027513] [2023-11-26 11:45:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677027513] [2023-11-26 11:45:23,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677027513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:23,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:23,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343086529] [2023-11-26 11:45:23,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:23,328 INFO L87 Difference]: Start difference. First operand 12423 states and 13642 transitions. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-11-26 11:45:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:26,342 INFO L93 Difference]: Finished difference Result 33815 states and 37394 transitions. [2023-11-26 11:45:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 425 [2023-11-26 11:45:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:26,398 INFO L225 Difference]: With dead ends: 33815 [2023-11-26 11:45:26,398 INFO L226 Difference]: Without dead ends: 21393 [2023-11-26 11:45:26,412 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 [2023-11-26 11:45:26,414 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 600 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:26,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 976 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-26 11:45:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21393 states. [2023-11-26 11:45:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21393 to 20703. [2023-11-26 11:45:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20703 states, 20702 states have (on average 1.0799922712781374) internal successors, (22358), 20702 states have internal predecessors, (22358), 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) [2023-11-26 11:45:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20703 states to 20703 states and 22358 transitions. [2023-11-26 11:45:26,745 INFO L78 Accepts]: Start accepts. Automaton has 20703 states and 22358 transitions. Word has length 425 [2023-11-26 11:45:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:26,746 INFO L495 AbstractCegarLoop]: Abstraction has 20703 states and 22358 transitions. [2023-11-26 11:45:26,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-11-26 11:45:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20703 states and 22358 transitions. [2023-11-26 11:45:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-26 11:45:26,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:26,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:26,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:45:26,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:26,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 789484855, now seen corresponding path program 1 times [2023-11-26 11:45:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:26,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596051347] [2023-11-26 11:45:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-26 11:45:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596051347] [2023-11-26 11:45:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596051347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:27,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212927898] [2023-11-26 11:45:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:27,266 INFO L87 Difference]: Start difference. First operand 20703 states and 22358 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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) [2023-11-26 11:45:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:30,169 INFO L93 Difference]: Finished difference Result 45545 states and 49881 transitions. [2023-11-26 11:45:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 432 [2023-11-26 11:45:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:30,217 INFO L225 Difference]: With dead ends: 45545 [2023-11-26 11:45:30,217 INFO L226 Difference]: Without dead ends: 22773 [2023-11-26 11:45:30,239 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 [2023-11-26 11:45:30,240 INFO L413 NwaCegarLoop]: 1111 mSDtfsCounter, 670 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:30,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1117 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-26 11:45:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22773 states. [2023-11-26 11:45:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22773 to 20013. [2023-11-26 11:45:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20013 states, 20012 states have (on average 1.0525684589246451) internal successors, (21064), 20012 states have internal predecessors, (21064), 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) [2023-11-26 11:45:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20013 states to 20013 states and 21064 transitions. [2023-11-26 11:45:30,606 INFO L78 Accepts]: Start accepts. Automaton has 20013 states and 21064 transitions. Word has length 432 [2023-11-26 11:45:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:30,607 INFO L495 AbstractCegarLoop]: Abstraction has 20013 states and 21064 transitions. [2023-11-26 11:45:30,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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) [2023-11-26 11:45:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20013 states and 21064 transitions. [2023-11-26 11:45:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2023-11-26 11:45:30,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:30,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:30,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:45:30,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:30,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1046585067, now seen corresponding path program 1 times [2023-11-26 11:45:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685409525] [2023-11-26 11:45:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-11-26 11:45:31,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685409525] [2023-11-26 11:45:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685409525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:31,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:31,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717679313] [2023-11-26 11:45:31,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:31,155 INFO L87 Difference]: Start difference. First operand 20013 states and 21064 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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)