./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/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_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/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_93603381-704e-4ac6-bccf-86d3bc77cf23/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 79b7ed930517f0c303520f60ebdea461202c3431ddfaa74076064178b3e4d861 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:00:46,461 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:00:46,533 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:00:46,537 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:00:46,538 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:00:46,566 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:00:46,567 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:00:46,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:00:46,568 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:00:46,569 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:00:46,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:00:46,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:00:46,571 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:00:46,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:00:46,572 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:00:46,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:00:46,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:00:46,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:00:46,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:00:46,576 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:00:46,576 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:00:46,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:00:46,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:00:46,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:00:46,592 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:00:46,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:00:46,593 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:00:46,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:00:46,594 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:00:46,595 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:00:46,595 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:00:46,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:46,596 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:00:46,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:00:46,598 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:00:46,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:00:46,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:00:46,599 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:00:46,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:00:46,600 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:00:46,600 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:00:46,601 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:00:46,601 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_93603381-704e-4ac6-bccf-86d3bc77cf23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79b7ed930517f0c303520f60ebdea461202c3431ddfaa74076064178b3e4d861 [2023-11-26 12:00:46,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:00:46,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:00:46,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:00:46,909 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:00:46,910 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:00:46,911 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem14_label40.c [2023-11-26 12:00:50,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:50,531 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:50,543 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/sv-benchmarks/c/eca-rers2012/Problem14_label40.c [2023-11-26 12:00:50,575 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/data/cfe3b3caa/442f1473227841a5b8f646ba478eb21a/FLAG690d9ca1d [2023-11-26 12:00:50,597 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/data/cfe3b3caa/442f1473227841a5b8f646ba478eb21a [2023-11-26 12:00:50,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:50,606 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:50,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:50,611 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:50,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:50,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f06fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:50, skipping insertion in model container [2023-11-26 12:00:50,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:50" (1/1) ... [2023-11-26 12:00:50,695 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:50,900 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_93603381-704e-4ac6-bccf-86d3bc77cf23/sv-benchmarks/c/eca-rers2012/Problem14_label40.c[2182,2195] [2023-11-26 12:00:51,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:51,167 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:51,186 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_93603381-704e-4ac6-bccf-86d3bc77cf23/sv-benchmarks/c/eca-rers2012/Problem14_label40.c[2182,2195] [2023-11-26 12:00:51,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:51,387 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:51,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51 WrapperNode [2023-11-26 12:00:51,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:51,389 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:51,390 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:51,390 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:51,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,544 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-26 12:00:51,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:51,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:51,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:51,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:51,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,574 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,632 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 12:00:51,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,713 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:51,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:51,767 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:51,767 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:51,768 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:51,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:51,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:51,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:51,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:51,942 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:51,947 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:53,408 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:53,455 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:53,456 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:00:53,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:53 BoogieIcfgContainer [2023-11-26 12:00:53,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:53,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:53,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:53,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:53,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:50" (1/3) ... [2023-11-26 12:00:53,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792477e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:53, skipping insertion in model container [2023-11-26 12:00:53,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51" (2/3) ... [2023-11-26 12:00:53,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792477e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:53, skipping insertion in model container [2023-11-26 12:00:53,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:53" (3/3) ... [2023-11-26 12:00:53,467 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label40.c [2023-11-26 12:00:53,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:53,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:00:53,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:53,562 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;@38869fc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:53,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:00:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 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 12:00:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 12:00:53,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:53,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:53,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:53,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1794323258, now seen corresponding path program 1 times [2023-11-26 12:00:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:53,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562805920] [2023-11-26 12:00:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,764 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 12:00:53,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:53,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562805920] [2023-11-26 12:00:53,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562805920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:53,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:53,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257966697] [2023-11-26 12:00:53,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:53,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:00:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:00:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:53,872 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 12:00:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:53,944 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-26 12:00:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:00:53,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2023-11-26 12:00:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:53,966 INFO L225 Difference]: With dead ends: 365 [2023-11-26 12:00:53,967 INFO L226 Difference]: Without dead ends: 181 [2023-11-26 12:00:53,972 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 12:00:53,977 INFO L413 NwaCegarLoop]: 295 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, 295 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 12:00:53,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-26 12:00:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-26 12:00:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 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 12:00:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-26 12:00:54,030 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 18 [2023-11-26 12:00:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:54,031 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-26 12:00:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 12:00:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-26 12:00:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 12:00:54,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:54,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:54,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:00:54,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:54,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash 325144876, now seen corresponding path program 1 times [2023-11-26 12:00:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:54,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425533285] [2023-11-26 12:00:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:54,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,241 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 12:00:54,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:54,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425533285] [2023-11-26 12:00:54,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425533285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:54,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942424248] [2023-11-26 12:00:54,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:54,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:54,251 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 12:00:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:55,249 INFO L93 Difference]: Finished difference Result 361 states and 589 transitions. [2023-11-26 12:00:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2023-11-26 12:00:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:55,254 INFO L225 Difference]: With dead ends: 361 [2023-11-26 12:00:55,254 INFO L226 Difference]: Without dead ends: 359 [2023-11-26 12:00:55,255 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 12:00:55,259 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:55,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 10 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:00:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-26 12:00:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-26 12:00:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.6396648044692737) internal successors, (587), 358 states have internal predecessors, (587), 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 12:00:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 587 transitions. [2023-11-26 12:00:55,296 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 587 transitions. Word has length 18 [2023-11-26 12:00:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:55,296 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 587 transitions. [2023-11-26 12:00:55,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 12:00:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 587 transitions. [2023-11-26 12:00:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-26 12:00:55,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:55,301 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 12:00:55,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:00:55,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:55,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1570100031, now seen corresponding path program 1 times [2023-11-26 12:00:55,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:55,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089654198] [2023-11-26 12:00:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:55,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:55,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:55,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089654198] [2023-11-26 12:00:55,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089654198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:55,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:55,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:55,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599426150] [2023-11-26 12:00:55,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:55,631 INFO L87 Difference]: Start difference. First operand 359 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 12:00:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:56,540 INFO L93 Difference]: Finished difference Result 1075 states and 1759 transitions. [2023-11-26 12:00:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 83 [2023-11-26 12:00:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:56,546 INFO L225 Difference]: With dead ends: 1075 [2023-11-26 12:00:56,546 INFO L226 Difference]: Without dead ends: 717 [2023-11-26 12:00:56,548 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 12:00:56,549 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:56,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 86 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:00:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-26 12:00:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2023-11-26 12:00:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.42296918767507) internal successors, (1016), 714 states have internal predecessors, (1016), 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 12:00:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1016 transitions. [2023-11-26 12:00:56,584 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1016 transitions. Word has length 83 [2023-11-26 12:00:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:56,585 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1016 transitions. [2023-11-26 12:00:56,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 12:00:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1016 transitions. [2023-11-26 12:00:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-26 12:00:56,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:56,590 INFO L195 NwaCegarLoop]: trace histogram [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 12:00:56,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:00:56,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:56,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:56,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1198596068, now seen corresponding path program 1 times [2023-11-26 12:00:56,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:56,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072423373] [2023-11-26 12:00:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:56,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072423373] [2023-11-26 12:00:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072423373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:56,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:56,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:56,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867815610] [2023-11-26 12:00:56,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:56,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:56,827 INFO L87 Difference]: Start difference. First operand 715 states and 1016 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 12:00:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:57,717 INFO L93 Difference]: Finished difference Result 1607 states and 2323 transitions. [2023-11-26 12:00:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 84 [2023-11-26 12:00:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:57,723 INFO L225 Difference]: With dead ends: 1607 [2023-11-26 12:00:57,724 INFO L226 Difference]: Without dead ends: 893 [2023-11-26 12:00:57,725 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 12:00:57,726 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 125 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:57,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 55 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:00:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-11-26 12:00:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2023-11-26 12:00:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3318385650224216) internal successors, (1188), 892 states have internal predecessors, (1188), 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 12:00:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1188 transitions. [2023-11-26 12:00:57,761 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1188 transitions. Word has length 84 [2023-11-26 12:00:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:57,763 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1188 transitions. [2023-11-26 12:00:57,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 12:00:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1188 transitions. [2023-11-26 12:00:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-26 12:00:57,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:57,767 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 12:00:57,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:00:57,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:57,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1208708853, now seen corresponding path program 1 times [2023-11-26 12:00:57,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:57,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414502022] [2023-11-26 12:00:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:57,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:58,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:58,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414502022] [2023-11-26 12:00:58,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414502022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:58,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:58,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929128591] [2023-11-26 12:00:58,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:58,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:58,138 INFO L87 Difference]: Start difference. First operand 893 states and 1188 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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 12:00:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:59,419 INFO L93 Difference]: Finished difference Result 2143 states and 2781 transitions. [2023-11-26 12:00:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2023-11-26 12:00:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:59,427 INFO L225 Difference]: With dead ends: 2143 [2023-11-26 12:00:59,428 INFO L226 Difference]: Without dead ends: 1251 [2023-11-26 12:00:59,429 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 12:00:59,430 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 440 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:59,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 121 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 12:00:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-11-26 12:00:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2023-11-26 12:00:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.2572115384615385) internal successors, (1569), 1248 states have internal predecessors, (1569), 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 12:00:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1569 transitions. [2023-11-26 12:00:59,465 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1569 transitions. Word has length 87 [2023-11-26 12:00:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:59,466 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1569 transitions. [2023-11-26 12:00:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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 12:00:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1569 transitions. [2023-11-26 12:00:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-26 12:00:59,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:59,468 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 12:00:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:00:59,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:59,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1888943553, now seen corresponding path program 1 times [2023-11-26 12:00:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:59,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201389601] [2023-11-26 12:00:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201389601] [2023-11-26 12:00:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201389601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:59,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:59,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850069286] [2023-11-26 12:00:59,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:59,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:59,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:59,592 INFO L87 Difference]: Start difference. First operand 1249 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 12:01:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:00,388 INFO L93 Difference]: Finished difference Result 2853 states and 3585 transitions. [2023-11-26 12:01:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:00,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2023-11-26 12:01:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:00,397 INFO L225 Difference]: With dead ends: 2853 [2023-11-26 12:01:00,398 INFO L226 Difference]: Without dead ends: 1427 [2023-11-26 12:01:00,400 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 12:01:00,401 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:00,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 294 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 12:01:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-11-26 12:01:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1249. [2023-11-26 12:01:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.2467948717948718) internal successors, (1556), 1248 states have internal predecessors, (1556), 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 12:01:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1556 transitions. [2023-11-26 12:01:00,445 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1556 transitions. Word has length 98 [2023-11-26 12:01:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:00,455 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1556 transitions. [2023-11-26 12:01:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 12:01:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1556 transitions. [2023-11-26 12:01:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-26 12:01:00,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:00,458 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:01:00,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:00,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash 506897489, now seen corresponding path program 1 times [2023-11-26 12:01:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22478020] [2023-11-26 12:01:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:00,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:01:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:00,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22478020] [2023-11-26 12:01:00,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22478020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:00,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:00,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:00,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556352975] [2023-11-26 12:01:00,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:00,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:01:00,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:01:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:01:00,762 INFO L87 Difference]: Start difference. First operand 1249 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 12:01:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:01,732 INFO L93 Difference]: Finished difference Result 2350 states and 2951 transitions. [2023-11-26 12:01:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:01:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 177 [2023-11-26 12:01:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:01,750 INFO L225 Difference]: With dead ends: 2350 [2023-11-26 12:01:01,750 INFO L226 Difference]: Without dead ends: 1251 [2023-11-26 12:01:01,752 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 12:01:01,753 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 112 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:01,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 117 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:01:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-11-26 12:01:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2023-11-26 12:01:01,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.1290064102564104) internal successors, (1409), 1248 states have internal predecessors, (1409), 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 12:01:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1409 transitions. [2023-11-26 12:01:01,790 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1409 transitions. Word has length 177 [2023-11-26 12:01:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:01,790 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1409 transitions. [2023-11-26 12:01:01,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 12:01:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1409 transitions. [2023-11-26 12:01:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-26 12:01:01,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:01,794 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-26 12:01:01,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 12:01:01,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:01,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash -945727957, now seen corresponding path program 1 times [2023-11-26 12:01:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:01,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412030278] [2023-11-26 12:01:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:01:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412030278] [2023-11-26 12:01:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412030278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:02,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:02,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454530772] [2023-11-26 12:01:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:02,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:02,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:02,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:02,092 INFO L87 Difference]: Start difference. First operand 1249 states and 1409 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 12:01:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:02,886 INFO L93 Difference]: Finished difference Result 3209 states and 3681 transitions. [2023-11-26 12:01:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 202 [2023-11-26 12:01:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:02,898 INFO L225 Difference]: With dead ends: 3209 [2023-11-26 12:01:02,898 INFO L226 Difference]: Without dead ends: 1961 [2023-11-26 12:01:02,900 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 12:01:02,901 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:02,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 73 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 12:01:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-26 12:01:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1961. [2023-11-26 12:01:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.1076530612244897) internal successors, (2171), 1960 states have internal predecessors, (2171), 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 12:01:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2171 transitions. [2023-11-26 12:01:02,954 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2171 transitions. Word has length 202 [2023-11-26 12:01:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:02,954 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2171 transitions. [2023-11-26 12:01:02,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 12:01:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2171 transitions. [2023-11-26 12:01:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-11-26 12:01:02,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:02,962 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:02,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 12:01:02,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:02,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash -36189684, now seen corresponding path program 1 times [2023-11-26 12:01:02,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:02,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070141971] [2023-11-26 12:01:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-26 12:01:03,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:03,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070141971] [2023-11-26 12:01:03,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070141971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:03,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:03,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:03,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666572035] [2023-11-26 12:01:03,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:03,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:01:03,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:01:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:01:03,519 INFO L87 Difference]: Start difference. First operand 1961 states and 2171 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 12:01:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:04,316 INFO L93 Difference]: Finished difference Result 3772 states and 4194 transitions. [2023-11-26 12:01:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:01:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 388 [2023-11-26 12:01:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:04,329 INFO L225 Difference]: With dead ends: 3772 [2023-11-26 12:01:04,329 INFO L226 Difference]: Without dead ends: 2139 [2023-11-26 12:01:04,332 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 12:01:04,333 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 14 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 12:01:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-26 12:01:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1961. [2023-11-26 12:01:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.073469387755102) internal successors, (2104), 1960 states have internal predecessors, (2104), 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 12:01:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2104 transitions. [2023-11-26 12:01:04,385 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2104 transitions. Word has length 388 [2023-11-26 12:01:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:04,386 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2104 transitions. [2023-11-26 12:01:04,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 12:01:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2104 transitions. [2023-11-26 12:01:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-11-26 12:01:04,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:04,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 12:01:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 12:01:04,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1487562219, now seen corresponding path program 1 times [2023-11-26 12:01:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975963803] [2023-11-26 12:01:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 317 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-26 12:01:05,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:05,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975963803] [2023-11-26 12:01:05,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975963803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35872207] [2023-11-26 12:01:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:05,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:05,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:05,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:05,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:01:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:05,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:01:05,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-26 12:01:05,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:05,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35872207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:05,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:05,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-26 12:01:05,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564780327] [2023-11-26 12:01:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:05,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:05,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:05,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:01:05,962 INFO L87 Difference]: Start difference. First operand 1961 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 12:01:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:06,590 INFO L93 Difference]: Finished difference Result 3743 states and 4050 transitions. [2023-11-26 12:01:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 414 [2023-11-26 12:01:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:06,603 INFO L225 Difference]: With dead ends: 3743 [2023-11-26 12:01:06,604 INFO L226 Difference]: Without dead ends: 2139 [2023-11-26 12:01:06,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:01:06,608 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:06,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 242 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-26 12:01:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1961. [2023-11-26 12:01:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.073469387755102) internal successors, (2104), 1960 states have internal predecessors, (2104), 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 12:01:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2104 transitions. [2023-11-26 12:01:06,663 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2104 transitions. Word has length 414 [2023-11-26 12:01:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:06,664 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2104 transitions. [2023-11-26 12:01:06,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 12:01:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2104 transitions. [2023-11-26 12:01:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2023-11-26 12:01:06,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:06,675 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 12:01:06,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:01:06,883 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:06,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1873790903, now seen corresponding path program 1 times [2023-11-26 12:01:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150861689] [2023-11-26 12:01:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 321 proven. 18 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-26 12:01:07,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:07,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150861689] [2023-11-26 12:01:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150861689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547875009] [2023-11-26 12:01:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:07,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:07,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:07,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:07,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:01:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:07,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:01:07,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2023-11-26 12:01:07,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:07,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547875009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:07,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:07,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 12:01:07,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976367852] [2023-11-26 12:01:07,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:07,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:07,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:07,938 INFO L87 Difference]: Start difference. First operand 1961 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 12:01:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:08,628 INFO L93 Difference]: Finished difference Result 4099 states and 4486 transitions. [2023-11-26 12:01:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 426 [2023-11-26 12:01:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:08,641 INFO L225 Difference]: With dead ends: 4099 [2023-11-26 12:01:08,642 INFO L226 Difference]: Without dead ends: 2495 [2023-11-26 12:01:08,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:08,645 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:08,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 242 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-26 12:01:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2139. [2023-11-26 12:01:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 1.0818521983161833) internal successors, (2313), 2138 states have internal predecessors, (2313), 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 12:01:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2313 transitions. [2023-11-26 12:01:08,727 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 2313 transitions. Word has length 426 [2023-11-26 12:01:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:08,728 INFO L495 AbstractCegarLoop]: Abstraction has 2139 states and 2313 transitions. [2023-11-26 12:01:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 12:01:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 2313 transitions. [2023-11-26 12:01:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-26 12:01:08,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:08,746 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:08,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:08,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 12:01:08,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:08,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1885681238, now seen corresponding path program 1 times [2023-11-26 12:01:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568622307] [2023-11-26 12:01:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 699 proven. 11 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:09,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:09,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568622307] [2023-11-26 12:01:09,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568622307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:09,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609435643] [2023-11-26 12:01:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:09,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:09,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:09,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:09,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:01:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:10,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:01:10,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2023-11-26 12:01:10,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609435643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:10,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:10,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 12:01:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417273309] [2023-11-26 12:01:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:10,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:10,113 INFO L87 Difference]: Start difference. First operand 2139 states and 2313 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 12:01:10,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:10,833 INFO L93 Difference]: Finished difference Result 4811 states and 5265 transitions. [2023-11-26 12:01:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:10,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 525 [2023-11-26 12:01:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:10,851 INFO L225 Difference]: With dead ends: 4811 [2023-11-26 12:01:10,851 INFO L226 Difference]: Without dead ends: 2851 [2023-11-26 12:01:10,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:10,855 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:10,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 230 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 12:01:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2023-11-26 12:01:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2495. [2023-11-26 12:01:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.0842020850040097) internal successors, (2704), 2494 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:01:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2704 transitions. [2023-11-26 12:01:10,930 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2704 transitions. Word has length 525 [2023-11-26 12:01:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 2704 transitions. [2023-11-26 12:01:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 12:01:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2704 transitions. [2023-11-26 12:01:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-26 12:01:10,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:10,945 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:10,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 12:01:11,153 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:11,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:11,154 INFO L85 PathProgramCache]: Analyzing trace with hash -22417399, now seen corresponding path program 1 times [2023-11-26 12:01:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:11,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129240852] [2023-11-26 12:01:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:11,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 775 proven. 11 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:11,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:11,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129240852] [2023-11-26 12:01:11,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129240852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:11,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485304088] [2023-11-26 12:01:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:11,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:11,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:01:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:12,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:01:12,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2023-11-26 12:01:12,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485304088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:12,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:12,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 12:01:12,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355027986] [2023-11-26 12:01:12,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:12,339 INFO L87 Difference]: Start difference. First operand 2495 states and 2704 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 12:01:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:13,030 INFO L93 Difference]: Finished difference Result 4811 states and 5232 transitions. [2023-11-26 12:01:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:13,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 544 [2023-11-26 12:01:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:13,048 INFO L225 Difference]: With dead ends: 4811 [2023-11-26 12:01:13,048 INFO L226 Difference]: Without dead ends: 2673 [2023-11-26 12:01:13,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:13,053 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 165 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:13,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 190 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-11-26 12:01:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2317. [2023-11-26 12:01:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.079447322970639) internal successors, (2500), 2316 states have internal predecessors, (2500), 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 12:01:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2500 transitions. [2023-11-26 12:01:13,125 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2500 transitions. Word has length 544 [2023-11-26 12:01:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:13,127 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2500 transitions. [2023-11-26 12:01:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 12:01:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2500 transitions. [2023-11-26 12:01:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2023-11-26 12:01:13,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:13,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:13,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:13,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 12:01:13,342 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:13,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1722652532, now seen corresponding path program 1 times [2023-11-26 12:01:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:13,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546826268] [2023-11-26 12:01:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 796 proven. 11 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:14,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546826268] [2023-11-26 12:01:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546826268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003217260] [2023-11-26 12:01:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:14,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:14,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:14,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:01:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:14,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:01:14,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2023-11-26 12:01:15,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003217260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:15,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:15,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-26 12:01:15,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054419839] [2023-11-26 12:01:15,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:15,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:15,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:15,013 INFO L87 Difference]: Start difference. First operand 2317 states and 2500 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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 12:01:15,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:15,562 INFO L93 Difference]: Finished difference Result 4811 states and 5221 transitions. [2023-11-26 12:01:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:15,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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 558 [2023-11-26 12:01:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:15,576 INFO L225 Difference]: With dead ends: 4811 [2023-11-26 12:01:15,577 INFO L226 Difference]: Without dead ends: 2851 [2023-11-26 12:01:15,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:15,580 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:15,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 46 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:01:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2023-11-26 12:01:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2851. [2023-11-26 12:01:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 1.075438596491228) internal successors, (3065), 2850 states have internal predecessors, (3065), 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 12:01:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 3065 transitions. [2023-11-26 12:01:15,648 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 3065 transitions. Word has length 558 [2023-11-26 12:01:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:15,649 INFO L495 AbstractCegarLoop]: Abstraction has 2851 states and 3065 transitions. [2023-11-26 12:01:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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 12:01:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 3065 transitions. [2023-11-26 12:01:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2023-11-26 12:01:15,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:15,657 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:15,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:01:15,870 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:15,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1796503329, now seen corresponding path program 1 times [2023-11-26 12:01:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:15,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484468550] [2023-11-26 12:01:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 1043 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-11-26 12:01:16,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:16,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484468550] [2023-11-26 12:01:16,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484468550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:16,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:16,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430348893] [2023-11-26 12:01:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:16,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:16,596 INFO L87 Difference]: Start difference. First operand 2851 states and 3065 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 12:01:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:17,213 INFO L93 Difference]: Finished difference Result 5701 states and 6158 transitions. [2023-11-26 12:01:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:17,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 627 [2023-11-26 12:01:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:17,229 INFO L225 Difference]: With dead ends: 5701 [2023-11-26 12:01:17,229 INFO L226 Difference]: Without dead ends: 3207 [2023-11-26 12:01:17,232 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 12:01:17,233 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:17,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 240 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2023-11-26 12:01:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3029. [2023-11-26 12:01:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 1.071664464993395) internal successors, (3245), 3028 states have internal predecessors, (3245), 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 12:01:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3245 transitions. [2023-11-26 12:01:17,299 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3245 transitions. Word has length 627 [2023-11-26 12:01:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:17,300 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 3245 transitions. [2023-11-26 12:01:17,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 12:01:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3245 transitions. [2023-11-26 12:01:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2023-11-26 12:01:17,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:17,309 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 12:01:17,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 12:01:17,310 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:17,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1694781986, now seen corresponding path program 1 times [2023-11-26 12:01:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:17,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931348093] [2023-11-26 12:01:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 828 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:17,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:17,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931348093] [2023-11-26 12:01:17,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931348093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:17,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:17,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:17,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484239268] [2023-11-26 12:01:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:17,883 INFO L87 Difference]: Start difference. First operand 3029 states and 3245 transitions. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 12:01:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:18,549 INFO L93 Difference]: Finished difference Result 6947 states and 7497 transitions. [2023-11-26 12:01:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 632 [2023-11-26 12:01:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:18,570 INFO L225 Difference]: With dead ends: 6947 [2023-11-26 12:01:18,570 INFO L226 Difference]: Without dead ends: 4097 [2023-11-26 12:01:18,574 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 12:01:18,575 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:18,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2023-11-26 12:01:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3919. [2023-11-26 12:01:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.071465033180194) internal successors, (4198), 3918 states have internal predecessors, (4198), 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 12:01:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4198 transitions. [2023-11-26 12:01:18,662 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4198 transitions. Word has length 632 [2023-11-26 12:01:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:18,663 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4198 transitions. [2023-11-26 12:01:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 12:01:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4198 transitions. [2023-11-26 12:01:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2023-11-26 12:01:18,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:18,672 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:18,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 12:01:18,672 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:18,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1663360338, now seen corresponding path program 1 times [2023-11-26 12:01:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:18,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466313629] [2023-11-26 12:01:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:18,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1508 backedges. 1052 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-11-26 12:01:19,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466313629] [2023-11-26 12:01:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466313629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:19,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:19,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966030630] [2023-11-26 12:01:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:19,314 INFO L87 Difference]: Start difference. First operand 3919 states and 4198 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 12:01:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:19,976 INFO L93 Difference]: Finished difference Result 8193 states and 8831 transitions. [2023-11-26 12:01:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 634 [2023-11-26 12:01:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:19,992 INFO L225 Difference]: With dead ends: 8193 [2023-11-26 12:01:19,992 INFO L226 Difference]: Without dead ends: 4275 [2023-11-26 12:01:19,997 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 12:01:19,997 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:19,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-26 12:01:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3919. [2023-11-26 12:01:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.0592138846350179) internal successors, (4150), 3918 states have internal predecessors, (4150), 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 12:01:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4150 transitions. [2023-11-26 12:01:20,073 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4150 transitions. Word has length 634 [2023-11-26 12:01:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:20,075 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4150 transitions. [2023-11-26 12:01:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 12:01:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4150 transitions. [2023-11-26 12:01:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2023-11-26 12:01:20,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:20,085 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:20,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 12:01:20,085 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:20,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2027369839, now seen corresponding path program 1 times [2023-11-26 12:01:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258496199] [2023-11-26 12:01:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 1453 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-11-26 12:01:20,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:20,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258496199] [2023-11-26 12:01:20,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258496199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:20,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:20,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:20,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191337478] [2023-11-26 12:01:20,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:20,797 INFO L87 Difference]: Start difference. First operand 3919 states and 4150 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 12:01:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:21,397 INFO L93 Difference]: Finished difference Result 7837 states and 8303 transitions. [2023-11-26 12:01:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 711 [2023-11-26 12:01:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:21,407 INFO L225 Difference]: With dead ends: 7837 [2023-11-26 12:01:21,407 INFO L226 Difference]: Without dead ends: 3919 [2023-11-26 12:01:21,411 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 12:01:21,412 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:21,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 230 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2023-11-26 12:01:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3919. [2023-11-26 12:01:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.0533435426237876) internal successors, (4127), 3918 states have internal predecessors, (4127), 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 12:01:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4127 transitions. [2023-11-26 12:01:21,482 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4127 transitions. Word has length 711 [2023-11-26 12:01:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:21,484 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4127 transitions. [2023-11-26 12:01:21,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 12:01:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4127 transitions. [2023-11-26 12:01:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-11-26 12:01:21,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:21,495 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 12:01:21,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 12:01:21,496 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:21,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 690220388, now seen corresponding path program 1 times [2023-11-26 12:01:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:21,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712085120] [2023-11-26 12:01:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 1283 proven. 155 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:22,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:22,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712085120] [2023-11-26 12:01:22,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712085120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:22,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485545255] [2023-11-26 12:01:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:22,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:22,290 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:22,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:01:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:01:22,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 1283 proven. 155 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:23,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 1283 proven. 155 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-26 12:01:23,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485545255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:23,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:23,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-26 12:01:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426174936] [2023-11-26 12:01:23,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:01:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:01:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:23,724 INFO L87 Difference]: Start difference. First operand 3919 states and 4127 transitions. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 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 12:01:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:24,956 INFO L93 Difference]: Finished difference Result 8905 states and 9395 transitions. [2023-11-26 12:01:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:01:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 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 787 [2023-11-26 12:01:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:24,969 INFO L225 Difference]: With dead ends: 8905 [2023-11-26 12:01:24,969 INFO L226 Difference]: Without dead ends: 5165 [2023-11-26 12:01:24,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:24,975 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:24,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 12:01:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-11-26 12:01:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4453. [2023-11-26 12:01:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 1.0534591194968554) internal successors, (4690), 4452 states have internal predecessors, (4690), 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 12:01:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 4690 transitions. [2023-11-26 12:01:25,066 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 4690 transitions. Word has length 787 [2023-11-26 12:01:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:25,068 INFO L495 AbstractCegarLoop]: Abstraction has 4453 states and 4690 transitions. [2023-11-26 12:01:25,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 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 12:01:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 4690 transitions. [2023-11-26 12:01:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2023-11-26 12:01:25,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:25,080 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 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 12:01:25,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:25,288 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:25,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2114457763, now seen corresponding path program 1 times [2023-11-26 12:01:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:25,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796189811] [2023-11-26 12:01:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2217 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-11-26 12:01:25,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:25,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796189811] [2023-11-26 12:01:25,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796189811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:25,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:25,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:25,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475391070] [2023-11-26 12:01:25,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:25,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:25,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:25,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:25,925 INFO L87 Difference]: Start difference. First operand 4453 states and 4690 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 12:01:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:26,522 INFO L93 Difference]: Finished difference Result 9439 states and 9969 transitions. [2023-11-26 12:01:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:26,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 859 [2023-11-26 12:01:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:26,533 INFO L225 Difference]: With dead ends: 9439 [2023-11-26 12:01:26,533 INFO L226 Difference]: Without dead ends: 5165 [2023-11-26 12:01:26,538 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 12:01:26,539 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:26,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 24 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:01:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-11-26 12:01:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4987. [2023-11-26 12:01:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4986 states have (on average 1.0507420778178902) internal successors, (5239), 4986 states have internal predecessors, (5239), 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 12:01:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 5239 transitions. [2023-11-26 12:01:26,628 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 5239 transitions. Word has length 859 [2023-11-26 12:01:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:26,629 INFO L495 AbstractCegarLoop]: Abstraction has 4987 states and 5239 transitions. [2023-11-26 12:01:26,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 12:01:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 5239 transitions. [2023-11-26 12:01:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2023-11-26 12:01:26,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:26,641 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:26,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 12:01:26,642 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:26,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash 750590896, now seen corresponding path program 1 times [2023-11-26 12:01:26,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041034824] [2023-11-26 12:01:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 1518 proven. 93 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2023-11-26 12:01:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:27,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041034824] [2023-11-26 12:01:27,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041034824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:27,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512235596] [2023-11-26 12:01:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:27,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:27,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:27,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:27,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:01:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:28,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:01:28,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 1611 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2023-11-26 12:01:28,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:28,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512235596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:28,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:28,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 12:01:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888566652] [2023-11-26 12:01:28,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:28,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:28,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:28,660 INFO L87 Difference]: Start difference. First operand 4987 states and 5239 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 12:01:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:29,190 INFO L93 Difference]: Finished difference Result 9973 states and 10480 transitions. [2023-11-26 12:01:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 877 [2023-11-26 12:01:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:29,201 INFO L225 Difference]: With dead ends: 9973 [2023-11-26 12:01:29,201 INFO L226 Difference]: Without dead ends: 5165 [2023-11-26 12:01:29,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:01:29,207 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:29,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:01:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-11-26 12:01:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4809. [2023-11-26 12:01:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 1.0517886855241265) internal successors, (5057), 4808 states have internal predecessors, (5057), 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 12:01:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5057 transitions. [2023-11-26 12:01:29,297 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 5057 transitions. Word has length 877 [2023-11-26 12:01:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:29,298 INFO L495 AbstractCegarLoop]: Abstraction has 4809 states and 5057 transitions. [2023-11-26 12:01:29,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 12:01:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 5057 transitions. [2023-11-26 12:01:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2023-11-26 12:01:29,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:29,311 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:29,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93603381-704e-4ac6-bccf-86d3bc77cf23/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:29,519 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:29,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash -740749046, now seen corresponding path program 1 times [2023-11-26 12:01:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176211351] [2023-11-26 12:01:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2927 backedges. 1993 proven. 0 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2023-11-26 12:01:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:30,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176211351] [2023-11-26 12:01:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176211351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:30,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:30,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:01:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647057633] [2023-11-26 12:01:30,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:30,496 INFO L87 Difference]: Start difference. First operand 4809 states and 5057 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 12:01:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:31,051 INFO L93 Difference]: Finished difference Result 9261 states and 9753 transitions. [2023-11-26 12:01:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:01:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 947 [2023-11-26 12:01:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:31,060 INFO L225 Difference]: With dead ends: 9261 [2023-11-26 12:01:31,060 INFO L226 Difference]: Without dead ends: 4631 [2023-11-26 12:01:31,064 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 12:01:31,066 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:31,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 215 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:01:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2023-11-26 12:01:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 4631. [2023-11-26 12:01:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 1.0436285097192224) internal successors, (4832), 4630 states have internal predecessors, (4832), 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 12:01:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 4832 transitions. [2023-11-26 12:01:31,144 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 4832 transitions. Word has length 947 [2023-11-26 12:01:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:31,144 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 4832 transitions. [2023-11-26 12:01:31,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 12:01:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 4832 transitions. [2023-11-26 12:01:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2023-11-26 12:01:31,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:31,158 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 3, 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 12:01:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 12:01:31,159 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:31,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -397752368, now seen corresponding path program 1 times [2023-11-26 12:01:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:31,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078025628] [2023-11-26 12:01:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:31,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat