./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya --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 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:42:25,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:42:25,782 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:42:25,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:42:25,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:42:25,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:42:25,811 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:42:25,811 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:42:25,812 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:42:25,812 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:42:25,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:42:25,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:42:25,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:42:25,815 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:42:25,816 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:42:25,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:42:25,817 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:42:25,817 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:42:25,818 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:42:25,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:42:25,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:42:25,820 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:42:25,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:42:25,821 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:42:25,821 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:42:25,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:42:25,822 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:42:25,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:42:25,823 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:42:25,824 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:42:25,824 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:42:25,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:42:25,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:42:25,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:42:25,825 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:42:25,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:42:25,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:42:25,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:42:25,826 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:42:25,826 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:42:25,826 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:42:25,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:42:25,827 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_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2023-11-29 00:42:26,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:42:26,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:42:26,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:42:26,068 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:42:26,069 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:42:26,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops-crafted-1/in-de51.c [2023-11-29 00:42:28,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:42:29,005 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:42:29,005 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/sv-benchmarks/c/loops-crafted-1/in-de51.c [2023-11-29 00:42:29,013 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/data/4c6548878/4da1250546f94c54998a9155e3268bc0/FLAG4effea9f2 [2023-11-29 00:42:29,393 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/data/4c6548878/4da1250546f94c54998a9155e3268bc0 [2023-11-29 00:42:29,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:42:29,397 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:42:29,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:42:29,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:42:29,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:42:29,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ff5f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29, skipping insertion in model container [2023-11-29 00:42:29,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,422 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:42:29,544 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_2aaecad8-2407-4521-939b-9fa0bd4e04e1/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2023-11-29 00:42:29,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:42:29,566 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:42:29,575 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_2aaecad8-2407-4521-939b-9fa0bd4e04e1/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2023-11-29 00:42:29,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:42:29,594 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:42:29,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29 WrapperNode [2023-11-29 00:42:29,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:42:29,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:42:29,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:42:29,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:42:29,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,609 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,627 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-11-29 00:42:29,627 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:42:29,628 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:42:29,628 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:42:29,628 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:42:29,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,639 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,651 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]. [2023-11-29 00:42:29,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:42:29,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:42:29,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:42:29,665 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:42:29,666 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (1/1) ... [2023-11-29 00:42:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:42:29,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:29,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:42:29,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:42:29,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:42:29,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:42:29,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:42:29,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:42:29,810 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:42:29,812 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:42:29,940 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:42:29,964 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:42:29,964 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 00:42:29,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:42:29 BoogieIcfgContainer [2023-11-29 00:42:29,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:42:29,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:42:29,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:42:29,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:42:29,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:42:29" (1/3) ... [2023-11-29 00:42:29,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53972216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:42:29, skipping insertion in model container [2023-11-29 00:42:29,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:42:29" (2/3) ... [2023-11-29 00:42:29,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53972216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:42:29, skipping insertion in model container [2023-11-29 00:42:29,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:42:29" (3/3) ... [2023-11-29 00:42:29,975 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2023-11-29 00:42:29,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:42:29,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:42:30,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:42:30,044 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;@10904fe9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:42:30,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:42:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:42:30,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 577542875, now seen corresponding path program 1 times [2023-11-29 00:42:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852312599] [2023-11-29 00:42:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:30,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:30,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852312599] [2023-11-29 00:42:30,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852312599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:30,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:30,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:42:30,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874304907] [2023-11-29 00:42:30,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:42:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:42:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:42:30,262 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:30,279 INFO L93 Difference]: Finished difference Result 24 states and 42 transitions. [2023-11-29 00:42:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:42:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-29 00:42:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:30,287 INFO L225 Difference]: With dead ends: 24 [2023-11-29 00:42:30,287 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 00:42:30,289 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 [2023-11-29 00:42:30,292 INFO L413 NwaCegarLoop]: 15 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, 15 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 [2023-11-29 00:42:30,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:42:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 00:42:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 00:42:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-11-29 00:42:30,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 10 [2023-11-29 00:42:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:30,316 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-11-29 00:42:30,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-11-29 00:42:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:42:30,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:42:30,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,318 INFO L85 PathProgramCache]: Analyzing trace with hash 573848791, now seen corresponding path program 1 times [2023-11-29 00:42:30,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267524143] [2023-11-29 00:42:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:30,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:30,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267524143] [2023-11-29 00:42:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267524143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:30,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:30,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:42:30,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783182341] [2023-11-29 00:42:30,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:30,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:42:30,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:30,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:42:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:42:30,639 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:30,686 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2023-11-29 00:42:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:42:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-29 00:42:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:30,687 INFO L225 Difference]: With dead ends: 21 [2023-11-29 00:42:30,688 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 00:42:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:42:30,690 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:30,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:42:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 00:42:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 00:42:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2023-11-29 00:42:30,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 10 [2023-11-29 00:42:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:30,698 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2023-11-29 00:42:30,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2023-11-29 00:42:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 00:42:30,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:42:30,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash 611108754, now seen corresponding path program 1 times [2023-11-29 00:42:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549854901] [2023-11-29 00:42:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549854901] [2023-11-29 00:42:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549854901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:30,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:30,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:42:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354681537] [2023-11-29 00:42:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:30,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:42:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:42:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:42:30,740 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:30,766 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2023-11-29 00:42:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:42:30,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-29 00:42:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:30,768 INFO L225 Difference]: With dead ends: 28 [2023-11-29 00:42:30,768 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 00:42:30,768 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 [2023-11-29 00:42:30,770 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:30,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:42:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 00:42:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 00:42:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-11-29 00:42:30,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 11 [2023-11-29 00:42:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:30,780 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-11-29 00:42:30,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-11-29 00:42:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 00:42:30,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:42:30,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash 656361283, now seen corresponding path program 1 times [2023-11-29 00:42:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156078356] [2023-11-29 00:42:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156078356] [2023-11-29 00:42:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156078356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:30,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:30,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:42:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428596517] [2023-11-29 00:42:30,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:30,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:42:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:42:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:42:30,819 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:30,850 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2023-11-29 00:42:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:42:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-29 00:42:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:30,852 INFO L225 Difference]: With dead ends: 40 [2023-11-29 00:42:30,852 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 00:42:30,853 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 [2023-11-29 00:42:30,854 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:30,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:42:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 00:42:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-11-29 00:42:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2023-11-29 00:42:30,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 11 [2023-11-29 00:42:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:30,867 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2023-11-29 00:42:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2023-11-29 00:42:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 00:42:30,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:42:30,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1697770205, now seen corresponding path program 1 times [2023-11-29 00:42:30,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131659630] [2023-11-29 00:42:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131659630] [2023-11-29 00:42:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131659630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:30,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:42:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321904311] [2023-11-29 00:42:30,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:30,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:42:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:30,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:42:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:42:30,929 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:30,973 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2023-11-29 00:42:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:42:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-29 00:42:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:30,974 INFO L225 Difference]: With dead ends: 37 [2023-11-29 00:42:30,974 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 00:42:30,975 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 [2023-11-29 00:42:30,976 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:30,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:42:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 00:42:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 00:42:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2023-11-29 00:42:30,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 11 [2023-11-29 00:42:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:30,986 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2023-11-29 00:42:30,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2023-11-29 00:42:30,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 00:42:30,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:42:30,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1658571140, now seen corresponding path program 1 times [2023-11-29 00:42:30,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658009155] [2023-11-29 00:42:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:31,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658009155] [2023-11-29 00:42:31,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658009155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:31,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541951809] [2023-11-29 00:42:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:31,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:31,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:31,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:42:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:31,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:42:31,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:31,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541951809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:31,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:31,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 00:42:31,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040673628] [2023-11-29 00:42:31,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:31,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:42:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:31,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:42:31,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:42:31,216 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2023-11-29 00:42:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:31,376 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2023-11-29 00:42:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:42:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2023-11-29 00:42:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:31,379 INFO L225 Difference]: With dead ends: 83 [2023-11-29 00:42:31,379 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 00:42:31,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:42:31,381 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:31,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 71 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 00:42:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2023-11-29 00:42:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2023-11-29 00:42:31,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 11 [2023-11-29 00:42:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:31,396 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2023-11-29 00:42:31,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2023-11-29 00:42:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2023-11-29 00:42:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 00:42:31,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:31,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:42:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:42:31,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:31,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash -900397997, now seen corresponding path program 1 times [2023-11-29 00:42:31,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:31,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017923647] [2023-11-29 00:42:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:31,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:31,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017923647] [2023-11-29 00:42:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017923647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203829668] [2023-11-29 00:42:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:31,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:31,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:31,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:31,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:42:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:31,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:42:31,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:31,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203829668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:31,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:31,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-29 00:42:31,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423062224] [2023-11-29 00:42:31,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:31,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:42:31,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:42:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:42:31,898 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:32,104 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2023-11-29 00:42:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:42:32,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2023-11-29 00:42:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:32,106 INFO L225 Difference]: With dead ends: 76 [2023-11-29 00:42:32,106 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 00:42:32,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:42:32,108 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:32,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 42 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 00:42:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2023-11-29 00:42:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2023-11-29 00:42:32,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2023-11-29 00:42:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:32,123 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2023-11-29 00:42:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2023-11-29 00:42:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 00:42:32,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:32,125 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:32,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:42:32,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:42:32,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:32,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash -704085993, now seen corresponding path program 2 times [2023-11-29 00:42:32,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:32,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370242719] [2023-11-29 00:42:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:32,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370242719] [2023-11-29 00:42:32,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370242719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122671291] [2023-11-29 00:42:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:32,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:32,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:32,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:42:32,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:32,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:42:32,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:32,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122671291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:32,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:32,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-29 00:42:32,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065874429] [2023-11-29 00:42:32,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:42:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:42:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:42:32,611 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:33,641 INFO L93 Difference]: Finished difference Result 222 states and 325 transitions. [2023-11-29 00:42:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:42:33,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 14 [2023-11-29 00:42:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:33,644 INFO L225 Difference]: With dead ends: 222 [2023-11-29 00:42:33,644 INFO L226 Difference]: Without dead ends: 205 [2023-11-29 00:42:33,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:42:33,646 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 320 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:33,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 297 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:42:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-29 00:42:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 69. [2023-11-29 00:42:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 68 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) [2023-11-29 00:42:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2023-11-29 00:42:33,678 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 14 [2023-11-29 00:42:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:33,679 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2023-11-29 00:42:33,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2023-11-29 00:42:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 00:42:33,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:33,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:33,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:42:33,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:42:33,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:33,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash -537926878, now seen corresponding path program 1 times [2023-11-29 00:42:33,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:33,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051891210] [2023-11-29 00:42:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:34,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051891210] [2023-11-29 00:42:34,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051891210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:34,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727814560] [2023-11-29 00:42:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:34,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:34,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:34,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:42:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:34,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:42:34,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:34,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:34,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727814560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:34,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:34,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2023-11-29 00:42:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103377104] [2023-11-29 00:42:34,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:34,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:42:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:42:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:42:34,331 INFO L87 Difference]: Start difference. First operand 69 states and 98 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:34,430 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2023-11-29 00:42:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:42:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 00:42:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:34,431 INFO L225 Difference]: With dead ends: 79 [2023-11-29 00:42:34,431 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 00:42:34,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:42:34,432 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:34,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 00:42:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 00:42:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 60 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2023-11-29 00:42:34,456 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 15 [2023-11-29 00:42:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:34,457 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2023-11-29 00:42:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2023-11-29 00:42:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:42:34,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:34,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:34,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:42:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:34,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:34,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash 538579383, now seen corresponding path program 1 times [2023-11-29 00:42:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:34,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226963111] [2023-11-29 00:42:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:34,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:42:34,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226963111] [2023-11-29 00:42:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226963111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422135127] [2023-11-29 00:42:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:34,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:34,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:34,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:42:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:34,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:42:34,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:42:34,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:42:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422135127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:34,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:34,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 00:42:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905900778] [2023-11-29 00:42:34,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:42:34,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:42:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:42:34,922 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:35,110 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2023-11-29 00:42:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:42:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 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 16 [2023-11-29 00:42:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:35,112 INFO L225 Difference]: With dead ends: 115 [2023-11-29 00:42:35,112 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 00:42:35,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:42:35,113 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:35,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 91 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 00:42:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2023-11-29 00:42:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 81 transitions. [2023-11-29 00:42:35,137 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 81 transitions. Word has length 16 [2023-11-29 00:42:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:35,137 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 81 transitions. [2023-11-29 00:42:35,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 81 transitions. [2023-11-29 00:42:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:42:35,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:35,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:35,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:42:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:42:35,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:35,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash -724514985, now seen corresponding path program 2 times [2023-11-29 00:42:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:35,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748226406] [2023-11-29 00:42:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:35,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:35,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748226406] [2023-11-29 00:42:35,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748226406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:35,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071374370] [2023-11-29 00:42:35,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:35,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:35,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:35,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:42:35,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:35,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:35,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:42:35,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:35,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071374370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:35,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-11-29 00:42:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833896109] [2023-11-29 00:42:35,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:35,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:42:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:42:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:42:35,644 INFO L87 Difference]: Start difference. First operand 57 states and 81 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:36,138 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2023-11-29 00:42:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:42:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 16 [2023-11-29 00:42:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:36,139 INFO L225 Difference]: With dead ends: 128 [2023-11-29 00:42:36,139 INFO L226 Difference]: Without dead ends: 116 [2023-11-29 00:42:36,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:42:36,141 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:36,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 108 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:42:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-29 00:42:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 73. [2023-11-29 00:42:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 102 transitions. [2023-11-29 00:42:36,164 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 102 transitions. Word has length 16 [2023-11-29 00:42:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:36,165 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 102 transitions. [2023-11-29 00:42:36,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 102 transitions. [2023-11-29 00:42:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 00:42:36,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:36,166 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:36,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:42:36,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:36,369 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:36,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash -526904697, now seen corresponding path program 2 times [2023-11-29 00:42:36,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:36,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858350760] [2023-11-29 00:42:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:36,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:42:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858350760] [2023-11-29 00:42:36,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858350760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:36,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95043277] [2023-11-29 00:42:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:36,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:36,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:42:36,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:36,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:42:36,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:36,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:42:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95043277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:36,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 13 [2023-11-29 00:42:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315710641] [2023-11-29 00:42:36,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:36,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:42:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:42:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:42:36,628 INFO L87 Difference]: Start difference. First operand 73 states and 102 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:37,136 INFO L93 Difference]: Finished difference Result 173 states and 236 transitions. [2023-11-29 00:42:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:42:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 00:42:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:37,138 INFO L225 Difference]: With dead ends: 173 [2023-11-29 00:42:37,138 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 00:42:37,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:42:37,140 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 82 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:37,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 275 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:42:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 00:42:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 88. [2023-11-29 00:42:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 87 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2023-11-29 00:42:37,175 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 18 [2023-11-29 00:42:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:37,175 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2023-11-29 00:42:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2023-11-29 00:42:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:42:37,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:37,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:37,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:42:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:42:37,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:37,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash 376510755, now seen corresponding path program 2 times [2023-11-29 00:42:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925389251] [2023-11-29 00:42:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:42:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:37,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925389251] [2023-11-29 00:42:37,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925389251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:37,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288960420] [2023-11-29 00:42:37,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:37,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:37,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:37,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:37,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:42:37,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:37,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:42:37,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:42:37,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:42:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288960420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:37,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:37,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 00:42:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285806370] [2023-11-29 00:42:37,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:37,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:42:37,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:42:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:42:37,586 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:37,710 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2023-11-29 00:42:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:42:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 19 [2023-11-29 00:42:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:37,711 INFO L225 Difference]: With dead ends: 121 [2023-11-29 00:42:37,711 INFO L226 Difference]: Without dead ends: 112 [2023-11-29 00:42:37,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:42:37,713 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:37,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 47 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-29 00:42:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2023-11-29 00:42:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3846153846153846) internal successors, (126), 91 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-11-29 00:42:37,744 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 19 [2023-11-29 00:42:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:37,744 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-11-29 00:42:37,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-11-29 00:42:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:42:37,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:37,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:37,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:42:37,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:42:37,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:37,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1148094125, now seen corresponding path program 3 times [2023-11-29 00:42:37,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:37,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376373267] [2023-11-29 00:42:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:38,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:38,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376373267] [2023-11-29 00:42:38,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376373267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:38,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422001561] [2023-11-29 00:42:38,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:38,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:38,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:38,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:38,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:42:38,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:42:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:38,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:42:38,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:42:38,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:42:38,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422001561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:38,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:38,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-11-29 00:42:38,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843981198] [2023-11-29 00:42:38,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:38,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:42:38,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:42:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:42:38,325 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:39,830 INFO L93 Difference]: Finished difference Result 220 states and 291 transitions. [2023-11-29 00:42:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 00:42:39,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 00:42:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:39,832 INFO L225 Difference]: With dead ends: 220 [2023-11-29 00:42:39,832 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 00:42:39,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 00:42:39,834 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 194 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:39,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 158 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:42:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 00:42:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 113. [2023-11-29 00:42:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3660714285714286) internal successors, (153), 112 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2023-11-29 00:42:39,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 19 [2023-11-29 00:42:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:39,875 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2023-11-29 00:42:39,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2023-11-29 00:42:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 00:42:39,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:39,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:39,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:42:40,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:42:40,077 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -673395657, now seen corresponding path program 3 times [2023-11-29 00:42:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:40,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381817203] [2023-11-29 00:42:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381817203] [2023-11-29 00:42:40,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381817203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909296516] [2023-11-29 00:42:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:40,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:40,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:40,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:42:40,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:42:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:40,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:42:40,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:40,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:40,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909296516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:40,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-11-29 00:42:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693953723] [2023-11-29 00:42:40,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:42:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:42:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:42:40,563 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:40,697 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2023-11-29 00:42:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:42:40,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 20 [2023-11-29 00:42:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:40,698 INFO L225 Difference]: With dead ends: 126 [2023-11-29 00:42:40,698 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 00:42:40,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:42:40,703 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:40,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 00:42:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-29 00:42:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 102 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2023-11-29 00:42:40,741 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 20 [2023-11-29 00:42:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:40,741 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2023-11-29 00:42:40,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2023-11-29 00:42:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 00:42:40,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:40,742 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:40,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:42:40,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:42:40,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:40,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash -46461483, now seen corresponding path program 4 times [2023-11-29 00:42:40,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:40,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514548694] [2023-11-29 00:42:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:40,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:41,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:41,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514548694] [2023-11-29 00:42:41,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514548694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:41,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175710729] [2023-11-29 00:42:41,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:42:41,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:41,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:41,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:42:41,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:42:41,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:41,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:42:41,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:41,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175710729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:41,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:41,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 00:42:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629635387] [2023-11-29 00:42:41,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:42:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:42:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:42:41,313 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:46,984 INFO L93 Difference]: Finished difference Result 432 states and 607 transitions. [2023-11-29 00:42:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 00:42:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 00:42:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:46,988 INFO L225 Difference]: With dead ends: 432 [2023-11-29 00:42:46,988 INFO L226 Difference]: Without dead ends: 401 [2023-11-29 00:42:46,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1521, Invalid=4331, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 00:42:46,991 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 634 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:46,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 500 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:42:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-29 00:42:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 128. [2023-11-29 00:42:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.4015748031496063) internal successors, (178), 127 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 178 transitions. [2023-11-29 00:42:47,053 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 178 transitions. Word has length 20 [2023-11-29 00:42:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:47,053 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 178 transitions. [2023-11-29 00:42:47,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 178 transitions. [2023-11-29 00:42:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 00:42:47,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:47,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:47,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:42:47,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:42:47,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:47,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash -133519913, now seen corresponding path program 3 times [2023-11-29 00:42:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:47,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050132119] [2023-11-29 00:42:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:47,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:42:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:47,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050132119] [2023-11-29 00:42:47,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050132119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:47,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848305425] [2023-11-29 00:42:47,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:47,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:47,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:47,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:42:47,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:42:47,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:47,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:42:47,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:42:47,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 00:42:47,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848305425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:47,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 00:42:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033716754] [2023-11-29 00:42:47,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:42:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:42:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:42:47,613 INFO L87 Difference]: Start difference. First operand 128 states and 178 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:48,198 INFO L93 Difference]: Finished difference Result 242 states and 316 transitions. [2023-11-29 00:42:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 00:42:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 00:42:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:48,200 INFO L225 Difference]: With dead ends: 242 [2023-11-29 00:42:48,200 INFO L226 Difference]: Without dead ends: 210 [2023-11-29 00:42:48,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:42:48,202 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 116 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:48,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 271 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:42:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-29 00:42:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 120. [2023-11-29 00:42:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 119 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2023-11-29 00:42:48,249 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 22 [2023-11-29 00:42:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:48,249 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2023-11-29 00:42:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2023-11-29 00:42:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 00:42:48,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:48,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:48,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:42:48,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:42:48,451 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:48,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1686131159, now seen corresponding path program 4 times [2023-11-29 00:42:48,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:48,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051062613] [2023-11-29 00:42:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:48,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:48,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051062613] [2023-11-29 00:42:48,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051062613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:48,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667457614] [2023-11-29 00:42:48,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:42:48,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:48,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:48,607 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:48,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:42:48,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:42:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:48,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:42:48,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:42:48,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:42:48,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667457614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:48,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-11-29 00:42:48,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012847426] [2023-11-29 00:42:48,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:42:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:42:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:42:48,921 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:52,103 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2023-11-29 00:42:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 00:42:52,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 00:42:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:52,105 INFO L225 Difference]: With dead ends: 290 [2023-11-29 00:42:52,105 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 00:42:52,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=723, Invalid=6417, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 00:42:52,109 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 310 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:52,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 223 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:42:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 00:42:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 132. [2023-11-29 00:42:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 131 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 181 transitions. [2023-11-29 00:42:52,160 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 181 transitions. Word has length 22 [2023-11-29 00:42:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:52,161 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 181 transitions. [2023-11-29 00:42:52,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 181 transitions. [2023-11-29 00:42:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:42:52,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:52,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:52,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:42:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:42:52,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:52,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 178964674, now seen corresponding path program 5 times [2023-11-29 00:42:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:52,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124635585] [2023-11-29 00:42:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:42:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124635585] [2023-11-29 00:42:52,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124635585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098756958] [2023-11-29 00:42:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:42:52,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:52,487 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:52,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:42:52,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:42:52,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:52,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:42:52,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:42:52,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:42:52,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098756958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:52,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-11-29 00:42:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134485655] [2023-11-29 00:42:52,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:52,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:42:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:42:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:42:52,684 INFO L87 Difference]: Start difference. First operand 132 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:52,912 INFO L93 Difference]: Finished difference Result 212 states and 287 transitions. [2023-11-29 00:42:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:42:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2023-11-29 00:42:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:52,913 INFO L225 Difference]: With dead ends: 212 [2023-11-29 00:42:52,913 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 00:42:52,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:42:52,914 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:52,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 108 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 00:42:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 149. [2023-11-29 00:42:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.364864864864865) internal successors, (202), 148 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) [2023-11-29 00:42:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 202 transitions. [2023-11-29 00:42:52,991 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 202 transitions. Word has length 23 [2023-11-29 00:42:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:52,991 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 202 transitions. [2023-11-29 00:42:52,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 202 transitions. [2023-11-29 00:42:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:42:52,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:52,992 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:52,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:42:53,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:53,193 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:53,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 729246020, now seen corresponding path program 4 times [2023-11-29 00:42:53,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:53,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274727819] [2023-11-29 00:42:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:53,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:42:53,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274727819] [2023-11-29 00:42:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274727819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:53,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537936154] [2023-11-29 00:42:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:42:53,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:53,348 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:53,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:42:53,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:42:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:53,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:42:53,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:42:53,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 00:42:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537936154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:53,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:53,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 7] total 21 [2023-11-29 00:42:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795130451] [2023-11-29 00:42:53,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:53,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:42:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:42:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:42:53,581 INFO L87 Difference]: Start difference. First operand 149 states and 202 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:55,115 INFO L93 Difference]: Finished difference Result 349 states and 469 transitions. [2023-11-29 00:42:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 00:42:55,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 00:42:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:55,118 INFO L225 Difference]: With dead ends: 349 [2023-11-29 00:42:55,118 INFO L226 Difference]: Without dead ends: 332 [2023-11-29 00:42:55,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 00:42:55,119 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 138 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:55,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 644 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:42:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-29 00:42:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 165. [2023-11-29 00:42:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3658536585365855) internal successors, (224), 164 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 224 transitions. [2023-11-29 00:42:55,221 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 224 transitions. Word has length 23 [2023-11-29 00:42:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:55,221 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 224 transitions. [2023-11-29 00:42:55,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 224 transitions. [2023-11-29 00:42:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:42:55,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:55,222 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:55,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:42:55,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:55,422 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:55,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 566695876, now seen corresponding path program 3 times [2023-11-29 00:42:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213468016] [2023-11-29 00:42:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:55,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:55,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213468016] [2023-11-29 00:42:55,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213468016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872203981] [2023-11-29 00:42:55,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:55,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:55,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:55,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:55,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:42:55,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 00:42:55,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:55,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:42:55,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:55,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872203981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:56,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:56,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-29 00:42:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975609768] [2023-11-29 00:42:56,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:42:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:42:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:42:56,227 INFO L87 Difference]: Start difference. First operand 165 states and 224 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:14,214 WARN L293 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:43:24,815 WARN L293 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:43:31,561 WARN L293 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:44:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:18,912 INFO L93 Difference]: Finished difference Result 1054 states and 1547 transitions. [2023-11-29 00:44:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 00:44:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 00:44:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:18,917 INFO L225 Difference]: With dead ends: 1054 [2023-11-29 00:44:18,917 INFO L226 Difference]: Without dead ends: 1005 [2023-11-29 00:44:18,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 78.8s TimeCoverageRelationStatistics Valid=2158, Invalid=4814, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 00:44:18,920 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1872 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:18,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1872 Valid, 1664 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 00:44:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2023-11-29 00:44:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 226. [2023-11-29 00:44:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.3733333333333333) internal successors, (309), 225 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 309 transitions. [2023-11-29 00:44:19,121 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 309 transitions. Word has length 23 [2023-11-29 00:44:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:19,122 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 309 transitions. [2023-11-29 00:44:19,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 309 transitions. [2023-11-29 00:44:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 00:44:19,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:19,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:19,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:44:19,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:44:19,323 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:19,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1367058242, now seen corresponding path program 6 times [2023-11-29 00:44:19,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:19,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9309781] [2023-11-29 00:44:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:44:19,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:19,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9309781] [2023-11-29 00:44:19,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9309781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:19,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080861005] [2023-11-29 00:44:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:44:19,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:19,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:19,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:44:19,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:44:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:19,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:44:19,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:44:19,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:44:19,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080861005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:19,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:19,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2023-11-29 00:44:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578860796] [2023-11-29 00:44:19,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:19,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:44:19,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:44:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:44:19,938 INFO L87 Difference]: Start difference. First operand 226 states and 309 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:20,250 INFO L93 Difference]: Finished difference Result 241 states and 324 transitions. [2023-11-29 00:44:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:44:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 00:44:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:20,252 INFO L225 Difference]: With dead ends: 241 [2023-11-29 00:44:20,252 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 00:44:20,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:44:20,253 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:20,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:44:20,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 00:44:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-29 00:44:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.3867924528301887) internal successors, (294), 212 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 294 transitions. [2023-11-29 00:44:20,405 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 294 transitions. Word has length 25 [2023-11-29 00:44:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:20,405 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 294 transitions. [2023-11-29 00:44:20,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 294 transitions. [2023-11-29 00:44:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 00:44:20,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:20,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:20,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:44:20,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:44:20,606 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:20,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:20,606 INFO L85 PathProgramCache]: Analyzing trace with hash -743887277, now seen corresponding path program 5 times [2023-11-29 00:44:20,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:20,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854185024] [2023-11-29 00:44:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:20,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:20,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854185024] [2023-11-29 00:44:20,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854185024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846075320] [2023-11-29 00:44:20,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:44:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:20,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:20,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:44:21,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 00:44:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:21,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 00:44:21,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:21,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:44:21,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846075320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:21,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:21,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 8] total 21 [2023-11-29 00:44:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040696330] [2023-11-29 00:44:21,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:21,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:44:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:44:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:44:21,423 INFO L87 Difference]: Start difference. First operand 213 states and 294 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:23,228 INFO L93 Difference]: Finished difference Result 504 states and 657 transitions. [2023-11-29 00:44:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 00:44:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 25 [2023-11-29 00:44:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:23,231 INFO L225 Difference]: With dead ends: 504 [2023-11-29 00:44:23,231 INFO L226 Difference]: Without dead ends: 476 [2023-11-29 00:44:23,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=806, Invalid=3354, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 00:44:23,233 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 244 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:23,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 445 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:44:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-29 00:44:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 233. [2023-11-29 00:44:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.396551724137931) internal successors, (324), 232 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2023-11-29 00:44:23,412 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 25 [2023-11-29 00:44:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:23,412 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2023-11-29 00:44:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2023-11-29 00:44:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:44:23,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:23,413 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:23,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:44:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:44:23,614 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:23,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1925221987, now seen corresponding path program 6 times [2023-11-29 00:44:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762554896] [2023-11-29 00:44:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 00:44:23,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762554896] [2023-11-29 00:44:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762554896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371062660] [2023-11-29 00:44:23,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:44:23,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:23,813 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:44:23,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 00:44:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:23,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:44:23,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 00:44:24,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 00:44:24,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371062660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:24,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:24,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-11-29 00:44:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788735940] [2023-11-29 00:44:24,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:24,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:44:24,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:44:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:44:24,226 INFO L87 Difference]: Start difference. First operand 233 states and 324 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:30,722 INFO L93 Difference]: Finished difference Result 688 states and 834 transitions. [2023-11-29 00:44:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 00:44:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 00:44:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:30,725 INFO L225 Difference]: With dead ends: 688 [2023-11-29 00:44:30,725 INFO L226 Difference]: Without dead ends: 659 [2023-11-29 00:44:30,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=902, Invalid=7654, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 00:44:30,728 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 497 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:30,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 959 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:44:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-11-29 00:44:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 266. [2023-11-29 00:44:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.4037735849056603) internal successors, (372), 265 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 372 transitions. [2023-11-29 00:44:30,948 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 372 transitions. Word has length 27 [2023-11-29 00:44:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:30,948 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 372 transitions. [2023-11-29 00:44:30,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 372 transitions. [2023-11-29 00:44:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 00:44:30,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:30,949 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:30,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:44:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:31,149 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:31,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1232767465, now seen corresponding path program 7 times [2023-11-29 00:44:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156673011] [2023-11-29 00:44:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 00:44:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156673011] [2023-11-29 00:44:31,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156673011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561751140] [2023-11-29 00:44:31,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:44:31,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:31,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:31,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:44:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:31,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:44:31,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 00:44:31,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 00:44:31,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561751140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:31,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:31,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-11-29 00:44:31,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512987377] [2023-11-29 00:44:31,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:31,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:44:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:44:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:44:31,663 INFO L87 Difference]: Start difference. First operand 266 states and 372 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:32,628 INFO L93 Difference]: Finished difference Result 518 states and 739 transitions. [2023-11-29 00:44:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:44:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 00:44:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:32,631 INFO L225 Difference]: With dead ends: 518 [2023-11-29 00:44:32,631 INFO L226 Difference]: Without dead ends: 502 [2023-11-29 00:44:32,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:44:32,632 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:32,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 181 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:44:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-29 00:44:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 375. [2023-11-29 00:44:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.4518716577540107) internal successors, (543), 374 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 543 transitions. [2023-11-29 00:44:32,938 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 543 transitions. Word has length 28 [2023-11-29 00:44:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:32,939 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 543 transitions. [2023-11-29 00:44:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 543 transitions. [2023-11-29 00:44:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 00:44:32,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:32,940 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:32,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:44:33,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:44:33,140 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:33,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:33,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1619121237, now seen corresponding path program 8 times [2023-11-29 00:44:33,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:33,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930006273] [2023-11-29 00:44:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:33,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:44:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930006273] [2023-11-29 00:44:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930006273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818105859] [2023-11-29 00:44:33,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:44:33,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:33,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:33,385 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:44:33,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:44:33,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:33,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 00:44:33,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:44:33,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:44:33,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818105859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:33,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:33,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-11-29 00:44:33,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272648481] [2023-11-29 00:44:33,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:33,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:44:33,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:44:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 00:44:33,989 INFO L87 Difference]: Start difference. First operand 375 states and 543 transitions. Second operand has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:53,252 WARN L293 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:45:07,375 WARN L293 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:45:29,803 WARN L293 SmtUtils]: Spent 14.35s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:45:58,727 WARN L293 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:46:17,940 WARN L293 SmtUtils]: Spent 11.12s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:46:50,907 WARN L293 SmtUtils]: Spent 13.14s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:47:02,068 WARN L293 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:47:26,347 WARN L293 SmtUtils]: Spent 13.14s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:47:36,439 WARN L293 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 57 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:48:05,185 WARN L293 SmtUtils]: Spent 9.61s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:48:42,181 WARN L293 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 56 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:48:51,562 WARN L293 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:49:28,992 WARN L293 SmtUtils]: Spent 10.67s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:50:57,927 WARN L293 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:51:14,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:51:17,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:51:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:18,326 INFO L93 Difference]: Finished difference Result 1695 states and 2578 transitions. [2023-11-29 00:51:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2023-11-29 00:51:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 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 28 [2023-11-29 00:51:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:18,339 INFO L225 Difference]: With dead ends: 1695 [2023-11-29 00:51:18,340 INFO L226 Difference]: Without dead ends: 1628 [2023-11-29 00:51:18,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10195 ImplicationChecksByTransitivity, 388.6s TimeCoverageRelationStatistics Valid=7107, Invalid=19298, Unknown=1, NotChecked=0, Total=26406 [2023-11-29 00:51:18,345 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2557 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 901 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2557 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:18,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2557 Valid, 1845 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 1407 Invalid, 1 Unknown, 0 Unchecked, 14.2s Time] [2023-11-29 00:51:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2023-11-29 00:51:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 420. [2023-11-29 00:51:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.4630071599045347) internal successors, (613), 419 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 613 transitions. [2023-11-29 00:51:18,831 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 613 transitions. Word has length 28 [2023-11-29 00:51:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:18,831 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 613 transitions. [2023-11-29 00:51:18,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 613 transitions. [2023-11-29 00:51:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:51:18,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:18,832 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:18,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:51:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:51:19,033 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:19,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1364550551, now seen corresponding path program 9 times [2023-11-29 00:51:19,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:19,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167840632] [2023-11-29 00:51:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:19,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:51:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167840632] [2023-11-29 00:51:19,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167840632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279647111] [2023-11-29 00:51:19,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:51:19,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:19,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:19,617 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:19,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:51:19,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:51:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:19,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:51:19,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:51:19,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:51:20,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279647111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:20,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:20,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 21 [2023-11-29 00:51:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816457929] [2023-11-29 00:51:20,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:20,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:51:20,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:51:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:51:20,074 INFO L87 Difference]: Start difference. First operand 420 states and 613 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:20,927 INFO L93 Difference]: Finished difference Result 429 states and 621 transitions. [2023-11-29 00:51:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:51:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 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 30 [2023-11-29 00:51:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:20,930 INFO L225 Difference]: With dead ends: 429 [2023-11-29 00:51:20,930 INFO L226 Difference]: Without dead ends: 404 [2023-11-29 00:51:20,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:51:20,931 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:20,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:51:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-29 00:51:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2023-11-29 00:51:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.478908188585608) internal successors, (596), 403 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 596 transitions. [2023-11-29 00:51:21,401 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 596 transitions. Word has length 30 [2023-11-29 00:51:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:21,401 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 596 transitions. [2023-11-29 00:51:21,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 596 transitions. [2023-11-29 00:51:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:51:21,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:21,403 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:21,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:51:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:21,603 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 440200663, now seen corresponding path program 7 times [2023-11-29 00:51:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312771103] [2023-11-29 00:51:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 00:51:21,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312771103] [2023-11-29 00:51:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312771103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759085957] [2023-11-29 00:51:21,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:51:21,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:21,816 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:21,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:51:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:21,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 00:51:21,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 00:51:22,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 00:51:22,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759085957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:22,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:22,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 37 [2023-11-29 00:51:22,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710077449] [2023-11-29 00:51:22,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:22,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:51:22,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:22,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:51:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 00:51:22,417 INFO L87 Difference]: Start difference. First operand 404 states and 596 transitions. Second operand has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:34,706 INFO L93 Difference]: Finished difference Result 1064 states and 1387 transitions. [2023-11-29 00:51:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-11-29 00:51:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 00:51:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:34,711 INFO L225 Difference]: With dead ends: 1064 [2023-11-29 00:51:34,711 INFO L226 Difference]: Without dead ends: 1015 [2023-11-29 00:51:34,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5928 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2742, Invalid=15890, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 00:51:34,713 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 671 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:34,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 640 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:51:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2023-11-29 00:51:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 428. [2023-11-29 00:51:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.459016393442623) internal successors, (623), 427 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 623 transitions. [2023-11-29 00:51:35,254 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 623 transitions. Word has length 30 [2023-11-29 00:51:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:35,254 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 623 transitions. [2023-11-29 00:51:35,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 623 transitions. [2023-11-29 00:51:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 00:51:35,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:35,255 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:35,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 00:51:35,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:51:35,456 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:35,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1227732645, now seen corresponding path program 5 times [2023-11-29 00:51:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:35,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051419783] [2023-11-29 00:51:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 00:51:35,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:35,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051419783] [2023-11-29 00:51:35,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051419783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:35,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775418077] [2023-11-29 00:51:35,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:51:35,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:35,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:35,683 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:35,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:51:35,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 00:51:35,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:35,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 00:51:35,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 00:51:36,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 00:51:36,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775418077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:36,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:36,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2023-11-29 00:51:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082962176] [2023-11-29 00:51:36,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 00:51:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 00:51:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:51:36,385 INFO L87 Difference]: Start difference. First operand 428 states and 623 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:40,273 INFO L93 Difference]: Finished difference Result 712 states and 944 transitions. [2023-11-29 00:51:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 00:51:40,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 00:51:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:40,277 INFO L225 Difference]: With dead ends: 712 [2023-11-29 00:51:40,277 INFO L226 Difference]: Without dead ends: 611 [2023-11-29 00:51:40,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=453, Invalid=3453, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 00:51:40,278 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 231 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:40,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 934 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:51:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2023-11-29 00:51:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 405. [2023-11-29 00:51:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.4356435643564356) internal successors, (580), 404 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 580 transitions. [2023-11-29 00:51:40,745 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 580 transitions. Word has length 32 [2023-11-29 00:51:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:40,745 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 580 transitions. [2023-11-29 00:51:40,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 580 transitions. [2023-11-29 00:51:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 00:51:40,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:40,746 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:40,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 00:51:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:51:40,946 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:40,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash 711781495, now seen corresponding path program 6 times [2023-11-29 00:51:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:40,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702951839] [2023-11-29 00:51:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:40,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 00:51:41,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:41,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702951839] [2023-11-29 00:51:41,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702951839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:41,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514966559] [2023-11-29 00:51:41,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:51:41,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:41,150 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:41,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:51:41,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 00:51:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:41,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:51:41,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 00:51:41,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 00:51:41,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514966559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:41,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:41,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 27 [2023-11-29 00:51:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734745690] [2023-11-29 00:51:41,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:41,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 00:51:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 00:51:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:51:41,651 INFO L87 Difference]: Start difference. First operand 405 states and 580 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:44,849 INFO L93 Difference]: Finished difference Result 669 states and 881 transitions. [2023-11-29 00:51:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 00:51:44,849 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 00:51:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:44,853 INFO L225 Difference]: With dead ends: 669 [2023-11-29 00:51:44,853 INFO L226 Difference]: Without dead ends: 603 [2023-11-29 00:51:44,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=493, Invalid=4063, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 00:51:44,854 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 219 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:44,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 988 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:51:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-11-29 00:51:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 378. [2023-11-29 00:51:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.4217506631299734) internal successors, (536), 377 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 536 transitions. [2023-11-29 00:51:45,344 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 536 transitions. Word has length 32 [2023-11-29 00:51:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:45,344 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 536 transitions. [2023-11-29 00:51:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 536 transitions. [2023-11-29 00:51:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 00:51:45,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:45,345 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:45,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-29 00:51:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:45,545 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:45,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2129744059, now seen corresponding path program 10 times [2023-11-29 00:51:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055189261] [2023-11-29 00:51:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:51:45,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:45,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055189261] [2023-11-29 00:51:45,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055189261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:45,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962496651] [2023-11-29 00:51:45,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:51:45,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:45,824 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:45,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:51:45,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:51:45,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:45,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 00:51:45,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:51:46,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-29 00:51:46,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962496651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:46,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:46,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 8] total 31 [2023-11-29 00:51:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408174629] [2023-11-29 00:51:46,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:46,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 00:51:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 00:51:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:51:46,228 INFO L87 Difference]: Start difference. First operand 378 states and 536 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:51,709 INFO L93 Difference]: Finished difference Result 869 states and 1179 transitions. [2023-11-29 00:51:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-29 00:51:51,709 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 00:51:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:51,713 INFO L225 Difference]: With dead ends: 869 [2023-11-29 00:51:51,713 INFO L226 Difference]: Without dead ends: 828 [2023-11-29 00:51:51,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=973, Invalid=12367, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 00:51:51,714 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 236 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:51,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1721 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2884 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:51:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-11-29 00:51:52,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 405. [2023-11-29 00:51:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.4183168316831682) internal successors, (573), 404 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 573 transitions. [2023-11-29 00:51:52,254 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 573 transitions. Word has length 32 [2023-11-29 00:51:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:52,255 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 573 transitions. [2023-11-29 00:51:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 573 transitions. [2023-11-29 00:51:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 00:51:52,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:52,256 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:52,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:51:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:52,456 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:52,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1475265762, now seen corresponding path program 11 times [2023-11-29 00:51:52,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:52,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618264290] [2023-11-29 00:51:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 00:51:52,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618264290] [2023-11-29 00:51:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618264290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945533350] [2023-11-29 00:51:52,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:51:52,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:52,622 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:52,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:51:52,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 00:51:52,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:52,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:51:52,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 00:51:52,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 00:51:52,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945533350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:52,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:52,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-29 00:51:52,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606234340] [2023-11-29 00:51:52,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:52,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:51:52,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:51:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:51:52,958 INFO L87 Difference]: Start difference. First operand 405 states and 573 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:54,801 INFO L93 Difference]: Finished difference Result 685 states and 958 transitions. [2023-11-29 00:51:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:51:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 00:51:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:54,805 INFO L225 Difference]: With dead ends: 685 [2023-11-29 00:51:54,805 INFO L226 Difference]: Without dead ends: 666 [2023-11-29 00:51:54,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:51:54,806 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 275 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:54,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 223 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:51:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-29 00:51:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 516. [2023-11-29 00:51:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.4271844660194175) internal successors, (735), 515 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 735 transitions. [2023-11-29 00:51:55,625 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 735 transitions. Word has length 33 [2023-11-29 00:51:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:55,626 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 735 transitions. [2023-11-29 00:51:55,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 735 transitions. [2023-11-29 00:51:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:51:55,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:55,627 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:55,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:51:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:55,827 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:55,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash 272182245, now seen corresponding path program 8 times [2023-11-29 00:51:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:55,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537519045] [2023-11-29 00:51:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 00:51:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537519045] [2023-11-29 00:51:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537519045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106586464] [2023-11-29 00:51:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:51:56,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:56,101 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:56,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:51:56,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:51:56,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:56,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 00:51:56,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 00:51:56,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 00:51:56,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106586464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:56,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:56,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 42 [2023-11-29 00:51:56,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546475705] [2023-11-29 00:51:56,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:56,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 00:51:56,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:56,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 00:51:56,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:51:56,899 INFO L87 Difference]: Start difference. First operand 516 states and 735 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:25,616 INFO L93 Difference]: Finished difference Result 1288 states and 1673 transitions. [2023-11-29 00:52:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-11-29 00:52:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 00:52:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:25,624 INFO L225 Difference]: With dead ends: 1288 [2023-11-29 00:52:25,624 INFO L226 Difference]: Without dead ends: 1237 [2023-11-29 00:52:25,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10535 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=4315, Invalid=26485, Unknown=0, NotChecked=0, Total=30800 [2023-11-29 00:52:25,626 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1065 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 2034 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 2034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:25,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 712 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 2034 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 00:52:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2023-11-29 00:52:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 542. [2023-11-29 00:52:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.4158964879852125) internal successors, (766), 541 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 766 transitions. [2023-11-29 00:52:26,536 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 766 transitions. Word has length 34 [2023-11-29 00:52:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:26,537 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 766 transitions. [2023-11-29 00:52:26,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 766 transitions. [2023-11-29 00:52:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:52:26,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:26,538 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:26,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:52:26,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:26,738 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:52:26,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1148640361, now seen corresponding path program 12 times [2023-11-29 00:52:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:26,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780305185] [2023-11-29 00:52:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:26,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 00:52:27,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780305185] [2023-11-29 00:52:27,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780305185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164388885] [2023-11-29 00:52:27,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:52:27,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:27,111 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:27,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aaecad8-2407-4521-939b-9fa0bd4e04e1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:52:28,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 00:52:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:28,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 00:52:28,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 00:52:28,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 00:52:28,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164388885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:28,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:28,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2023-11-29 00:52:28,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943814907] [2023-11-29 00:52:28,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:52:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:52:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:52:28,890 INFO L87 Difference]: Start difference. First operand 542 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:25,128 WARN L293 SmtUtils]: Spent 28.17s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:54:01,432 WARN L293 SmtUtils]: Spent 16.35s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:54:59,981 WARN L293 SmtUtils]: Spent 43.11s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:55:34,337 WARN L293 SmtUtils]: Spent 15.03s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:56:12,935 WARN L293 SmtUtils]: Spent 24.32s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:57:03,009 WARN L293 SmtUtils]: Spent 29.93s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:57:19,411 WARN L293 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)