./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/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_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/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_5638c270-32d8-487f-ba9b-937eb49d7718/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 72bf3c0845cdd2bb0ceb7773d767081845ae984de3bbd8e14ca740b1ff59160d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:21:21,356 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:21:21,422 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:21:21,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:21:21,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:21:21,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:21:21,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:21:21,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:21:21,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:21:21,462 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:21:21,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:21:21,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:21:21,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:21:21,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:21:21,465 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:21:21,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:21:21,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:21:21,467 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:21:21,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:21:21,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:21:21,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:21:21,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:21:21,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:21:21,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:21:21,471 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:21:21,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:21:21,472 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:21:21,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:21:21,480 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:21:21,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:21:21,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:21:21,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:21,481 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:21:21,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:21:21,482 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:21:21,482 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:21:21,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:21:21,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:21:21,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:21:21,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:21:21,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:21:21,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:21:21,485 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_5638c270-32d8-487f-ba9b-937eb49d7718/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72bf3c0845cdd2bb0ceb7773d767081845ae984de3bbd8e14ca740b1ff59160d [2023-11-28 20:21:21,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:21:21,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:21:21,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:21:21,739 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:21:21,739 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:21:21,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i [2023-11-28 20:21:24,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:24,717 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:24,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i [2023-11-28 20:21:24,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/data/c6e238d54/52e177ba56a041c5893cd635c52b1fe4/FLAG96640aaca [2023-11-28 20:21:24,745 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/data/c6e238d54/52e177ba56a041c5893cd635c52b1fe4 [2023-11-28 20:21:24,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:24,749 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:24,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:24,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:24,754 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:24,755 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:24" (1/1) ... [2023-11-28 20:21:24,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bf815c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:24, skipping insertion in model container [2023-11-28 20:21:24,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:24" (1/1) ... [2023-11-28 20:21:24,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:24,938 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_5638c270-32d8-487f-ba9b-937eb49d7718/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i[916,929] [2023-11-28 20:21:25,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:25,173 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:25,185 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_5638c270-32d8-487f-ba9b-937eb49d7718/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i[916,929] [2023-11-28 20:21:25,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:25,315 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:25,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25 WrapperNode [2023-11-28 20:21:25,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:25,316 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:25,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:25,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:25,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,455 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 746 [2023-11-28 20:21:25,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:25,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:25,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:25,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:25,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,611 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]. [2023-11-28 20:21:25,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,612 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,691 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:25,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:25,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:25,710 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:25,710 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (1/1) ... [2023-11-28 20:21:25,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:25,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:25,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 20:21:25,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 20:21:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:21:25,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:25,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:25,885 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:25,887 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:26,997 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:27,051 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:27,051 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:21:27,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:27 BoogieIcfgContainer [2023-11-28 20:21:27,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:27,054 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:27,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:27,058 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:27,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:24" (1/3) ... [2023-11-28 20:21:27,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cef782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:27, skipping insertion in model container [2023-11-28 20:21:27,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:25" (2/3) ... [2023-11-28 20:21:27,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cef782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:27, skipping insertion in model container [2023-11-28 20:21:27,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:27" (3/3) ... [2023-11-28 20:21:27,060 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-79.i [2023-11-28 20:21:27,080 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:27,080 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:21:27,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:27,147 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;@bff75a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:27,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:21:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 214 states have (on average 1.6308411214953271) internal successors, (349), 215 states have internal predecessors, (349), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-28 20:21:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-28 20:21:27,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:27,204 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:27,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:27,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash -498709850, now seen corresponding path program 1 times [2023-11-28 20:21:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:27,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585973646] [2023-11-28 20:21:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:27,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:27,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:27,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585973646] [2023-11-28 20:21:27,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:21:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072509314] [2023-11-28 20:21:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:27,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:27,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:27,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:21:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:27,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:21:27,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2023-11-28 20:21:28,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072509314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:28,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048215167] [2023-11-28 20:21:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:28,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:21:28,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:21:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:28,069 INFO L87 Difference]: Start difference. First operand has 279 states, 214 states have (on average 1.6308411214953271) internal successors, (349), 215 states have internal predecessors, (349), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-28 20:21:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:28,148 INFO L93 Difference]: Finished difference Result 552 states and 1001 transitions. [2023-11-28 20:21:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:21:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) Word has length 433 [2023-11-28 20:21:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:28,162 INFO L225 Difference]: With dead ends: 552 [2023-11-28 20:21:28,162 INFO L226 Difference]: Without dead ends: 274 [2023-11-28 20:21:28,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:28,173 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:28,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 459 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-28 20:21:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2023-11-28 20:21:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 210 states have (on average 1.6095238095238096) internal successors, (338), 210 states have internal predecessors, (338), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-28 20:21:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 462 transitions. [2023-11-28 20:21:28,250 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 462 transitions. Word has length 433 [2023-11-28 20:21:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:28,251 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 462 transitions. [2023-11-28 20:21:28,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 64.0) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-28 20:21:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 462 transitions. [2023-11-28 20:21:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-28 20:21:28,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:28,294 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:28,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:28,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:21:28,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:28,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1063671014, now seen corresponding path program 1 times [2023-11-28 20:21:28,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:28,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215806039] [2023-11-28 20:21:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:28,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:28,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:28,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263250536] [2023-11-28 20:21:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:28,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:28,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:21:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:28,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:21:28,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:29,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215806039] [2023-11-28 20:21:29,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263250536] [2023-11-28 20:21:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263250536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:29,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:29,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:21:29,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64368622] [2023-11-28 20:21:29,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:29,189 INFO L87 Difference]: Start difference. First operand 274 states and 462 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:29,812 INFO L93 Difference]: Finished difference Result 960 states and 1618 transitions. [2023-11-28 20:21:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:29,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 433 [2023-11-28 20:21:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:29,822 INFO L225 Difference]: With dead ends: 960 [2023-11-28 20:21:29,822 INFO L226 Difference]: Without dead ends: 687 [2023-11-28 20:21:29,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:29,827 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 647 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:29,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1565 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:21:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2023-11-28 20:21:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 682. [2023-11-28 20:21:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 548 states have (on average 1.5894160583941606) internal successors, (871), 549 states have internal predecessors, (871), 130 states have call successors, (130), 3 states have call predecessors, (130), 3 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-28 20:21:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1131 transitions. [2023-11-28 20:21:29,948 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1131 transitions. Word has length 433 [2023-11-28 20:21:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:29,951 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 1131 transitions. [2023-11-28 20:21:29,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1131 transitions. [2023-11-28 20:21:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-28 20:21:29,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:29,964 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:29,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:21:30,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:30,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:30,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash -522604902, now seen corresponding path program 1 times [2023-11-28 20:21:30,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:30,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373543550] [2023-11-28 20:21:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:30,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:30,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:30,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890306256] [2023-11-28 20:21:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:30,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:30,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:30,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:21:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:30,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:21:30,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:34,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:34,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:34,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373543550] [2023-11-28 20:21:34,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:34,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890306256] [2023-11-28 20:21:34,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890306256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:34,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:34,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:21:34,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003789609] [2023-11-28 20:21:34,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:34,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:21:34,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:34,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:21:34,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:21:34,406 INFO L87 Difference]: Start difference. First operand 682 states and 1131 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:35,092 INFO L93 Difference]: Finished difference Result 1568 states and 2603 transitions. [2023-11-28 20:21:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:21:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 433 [2023-11-28 20:21:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:35,103 INFO L225 Difference]: With dead ends: 1568 [2023-11-28 20:21:35,103 INFO L226 Difference]: Without dead ends: 887 [2023-11-28 20:21:35,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:21:35,107 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 1129 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:35,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 3551 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:21:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-28 20:21:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2023-11-28 20:21:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 692 states have (on average 1.579479768786127) internal successors, (1093), 694 states have internal predecessors, (1093), 136 states have call successors, (136), 4 states have call predecessors, (136), 4 states have return successors, (136), 134 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-28 20:21:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1365 transitions. [2023-11-28 20:21:35,206 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1365 transitions. Word has length 433 [2023-11-28 20:21:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:35,208 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1365 transitions. [2023-11-28 20:21:35,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1365 transitions. [2023-11-28 20:21:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-28 20:21:35,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:35,217 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:35,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:21:35,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:35,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:35,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:35,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1383279968, now seen corresponding path program 1 times [2023-11-28 20:21:35,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:35,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572842306] [2023-11-28 20:21:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:35,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:35,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991113064] [2023-11-28 20:21:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:35,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:35,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:35,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:21:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:35,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:21:35,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:35,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572842306] [2023-11-28 20:21:35,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991113064] [2023-11-28 20:21:35,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991113064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:35,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475083555] [2023-11-28 20:21:35,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:35,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:35,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:35,899 INFO L87 Difference]: Start difference. First operand 833 states and 1365 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:36,042 INFO L93 Difference]: Finished difference Result 2318 states and 3797 transitions. [2023-11-28 20:21:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:36,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 435 [2023-11-28 20:21:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:36,055 INFO L225 Difference]: With dead ends: 2318 [2023-11-28 20:21:36,056 INFO L226 Difference]: Without dead ends: 1486 [2023-11-28 20:21:36,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:36,059 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 296 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:36,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 933 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:21:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2023-11-28 20:21:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1482. [2023-11-28 20:21:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1305 states have (on average 1.5954022988505747) internal successors, (2082), 1311 states have internal predecessors, (2082), 168 states have call successors, (168), 8 states have call predecessors, (168), 8 states have return successors, (168), 162 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-28 20:21:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2418 transitions. [2023-11-28 20:21:36,169 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2418 transitions. Word has length 435 [2023-11-28 20:21:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:36,170 INFO L495 AbstractCegarLoop]: Abstraction has 1482 states and 2418 transitions. [2023-11-28 20:21:36,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2418 transitions. [2023-11-28 20:21:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-28 20:21:36,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:36,181 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:36,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:21:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:36,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:36,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -507260962, now seen corresponding path program 1 times [2023-11-28 20:21:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:36,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28041058] [2023-11-28 20:21:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:36,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488676909] [2023-11-28 20:21:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:36,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:36,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:36,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:36,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:21:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:36,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:21:36,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:36,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:36,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:36,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28041058] [2023-11-28 20:21:36,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:36,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488676909] [2023-11-28 20:21:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488676909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:36,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:36,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187562151] [2023-11-28 20:21:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:36,910 INFO L87 Difference]: Start difference. First operand 1482 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:37,074 INFO L93 Difference]: Finished difference Result 3161 states and 5157 transitions. [2023-11-28 20:21:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 435 [2023-11-28 20:21:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:37,089 INFO L225 Difference]: With dead ends: 3161 [2023-11-28 20:21:37,090 INFO L226 Difference]: Without dead ends: 1680 [2023-11-28 20:21:37,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:37,094 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 408 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:37,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 846 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:21:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2023-11-28 20:21:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1564. [2023-11-28 20:21:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1323 states have (on average 1.5117157974300832) internal successors, (2000), 1330 states have internal predecessors, (2000), 230 states have call successors, (230), 10 states have call predecessors, (230), 10 states have return successors, (230), 223 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-28 20:21:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2460 transitions. [2023-11-28 20:21:37,248 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2460 transitions. Word has length 435 [2023-11-28 20:21:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:37,250 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2460 transitions. [2023-11-28 20:21:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2460 transitions. [2023-11-28 20:21:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-28 20:21:37,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:37,256 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:37,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:21:37,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:37,457 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:37,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash -214926572, now seen corresponding path program 1 times [2023-11-28 20:21:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:37,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346611461] [2023-11-28 20:21:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:37,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:37,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690278469] [2023-11-28 20:21:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:37,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:37,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:37,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:37,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:21:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:37,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:21:37,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 2437 proven. 147 refuted. 0 times theorem prover too weak. 4980 trivial. 0 not checked. [2023-11-28 20:21:38,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 36 proven. 147 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-28 20:21:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:39,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346611461] [2023-11-28 20:21:39,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:39,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690278469] [2023-11-28 20:21:39,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690278469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:39,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:39,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-28 20:21:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141322862] [2023-11-28 20:21:39,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:39,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:21:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:21:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:21:39,191 INFO L87 Difference]: Start difference. First operand 1564 states and 2460 transitions. Second operand has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2023-11-28 20:21:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:40,800 INFO L93 Difference]: Finished difference Result 5457 states and 8586 transitions. [2023-11-28 20:21:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:40,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) Word has length 436 [2023-11-28 20:21:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:40,822 INFO L225 Difference]: With dead ends: 5457 [2023-11-28 20:21:40,822 INFO L226 Difference]: Without dead ends: 4000 [2023-11-28 20:21:40,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:21:40,827 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 2707 mSDsluCounter, 3861 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2768 SdHoareTripleChecker+Valid, 4282 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:40,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2768 Valid, 4282 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:21:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2023-11-28 20:21:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2326. [2023-11-28 20:21:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1995 states have (on average 1.5152882205513785) internal successors, (3023), 2004 states have internal predecessors, (3023), 314 states have call successors, (314), 16 states have call predecessors, (314), 16 states have return successors, (314), 305 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-28 20:21:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3651 transitions. [2023-11-28 20:21:41,008 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3651 transitions. Word has length 436 [2023-11-28 20:21:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:41,009 INFO L495 AbstractCegarLoop]: Abstraction has 2326 states and 3651 transitions. [2023-11-28 20:21:41,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2023-11-28 20:21:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3651 transitions. [2023-11-28 20:21:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-28 20:21:41,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:41,014 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:41,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:21:41,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:41,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:41,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1932786235, now seen corresponding path program 1 times [2023-11-28 20:21:41,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:41,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563557672] [2023-11-28 20:21:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:41,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:41,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:41,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992816606] [2023-11-28 20:21:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:41,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:41,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:41,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:41,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:21:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:41,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:21:41,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:41,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:41,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563557672] [2023-11-28 20:21:41,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992816606] [2023-11-28 20:21:41,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992816606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:41,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:41,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:21:41,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937444797] [2023-11-28 20:21:41,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:41,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:21:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:21:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:21:41,940 INFO L87 Difference]: Start difference. First operand 2326 states and 3651 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:42,377 INFO L93 Difference]: Finished difference Result 5875 states and 9231 transitions. [2023-11-28 20:21:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:21:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 437 [2023-11-28 20:21:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:42,401 INFO L225 Difference]: With dead ends: 5875 [2023-11-28 20:21:42,401 INFO L226 Difference]: Without dead ends: 3663 [2023-11-28 20:21:42,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:42,407 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 352 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:42,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1606 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:21:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2023-11-28 20:21:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3505. [2023-11-28 20:21:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 3174 states have (on average 1.5428481411468178) internal successors, (4897), 3183 states have internal predecessors, (4897), 314 states have call successors, (314), 16 states have call predecessors, (314), 16 states have return successors, (314), 305 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-28 20:21:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 5525 transitions. [2023-11-28 20:21:42,660 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 5525 transitions. Word has length 437 [2023-11-28 20:21:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:42,661 INFO L495 AbstractCegarLoop]: Abstraction has 3505 states and 5525 transitions. [2023-11-28 20:21:42,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 5525 transitions. [2023-11-28 20:21:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-28 20:21:42,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:42,667 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:42,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:21:42,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:42,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:42,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1269876800, now seen corresponding path program 1 times [2023-11-28 20:21:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:42,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807522406] [2023-11-28 20:21:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:42,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074937307] [2023-11-28 20:21:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:42,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:42,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:42,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:21:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:43,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:21:43,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:43,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:43,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:43,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807522406] [2023-11-28 20:21:43,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:43,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074937307] [2023-11-28 20:21:43,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074937307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:43,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:43,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:21:43,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312840628] [2023-11-28 20:21:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:43,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:21:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:21:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:21:43,557 INFO L87 Difference]: Start difference. First operand 3505 states and 5525 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:43,871 INFO L93 Difference]: Finished difference Result 6985 states and 10969 transitions. [2023-11-28 20:21:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:21:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 439 [2023-11-28 20:21:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:43,889 INFO L225 Difference]: With dead ends: 6985 [2023-11-28 20:21:43,889 INFO L226 Difference]: Without dead ends: 3635 [2023-11-28 20:21:43,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:43,896 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 557 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:43,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1749 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2023-11-28 20:21:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3513. [2023-11-28 20:21:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3182 states have (on average 1.5389692017598995) internal successors, (4897), 3191 states have internal predecessors, (4897), 314 states have call successors, (314), 16 states have call predecessors, (314), 16 states have return successors, (314), 305 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-28 20:21:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5525 transitions. [2023-11-28 20:21:44,074 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5525 transitions. Word has length 439 [2023-11-28 20:21:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:44,075 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5525 transitions. [2023-11-28 20:21:44,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5525 transitions. [2023-11-28 20:21:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-28 20:21:44,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:44,080 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:44,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:21:44,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:44,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:44,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash 195657038, now seen corresponding path program 1 times [2023-11-28 20:21:44,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:44,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067129272] [2023-11-28 20:21:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:44,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:44,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:44,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603657792] [2023-11-28 20:21:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:44,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:44,343 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:44,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:21:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:44,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:21:44,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 1951 proven. 156 refuted. 0 times theorem prover too weak. 5457 trivial. 0 not checked. [2023-11-28 20:21:45,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-28 20:21:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067129272] [2023-11-28 20:21:45,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603657792] [2023-11-28 20:21:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603657792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:45,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-28 20:21:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429742191] [2023-11-28 20:21:45,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:45,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:45,339 INFO L87 Difference]: Start difference. First operand 3513 states and 5525 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-28 20:21:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:45,749 INFO L93 Difference]: Finished difference Result 6693 states and 10519 transitions. [2023-11-28 20:21:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:21:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 439 [2023-11-28 20:21:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:45,772 INFO L225 Difference]: With dead ends: 6693 [2023-11-28 20:21:45,772 INFO L226 Difference]: Without dead ends: 3583 [2023-11-28 20:21:45,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 870 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:21:45,779 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 263 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:45,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 986 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:21:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2023-11-28 20:21:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 3520. [2023-11-28 20:21:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3191 states have (on average 1.5249138201190848) internal successors, (4866), 3200 states have internal predecessors, (4866), 308 states have call successors, (308), 20 states have call predecessors, (308), 20 states have return successors, (308), 299 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-28 20:21:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 5482 transitions. [2023-11-28 20:21:46,008 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 5482 transitions. Word has length 439 [2023-11-28 20:21:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:46,009 INFO L495 AbstractCegarLoop]: Abstraction has 3520 states and 5482 transitions. [2023-11-28 20:21:46,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-28 20:21:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 5482 transitions. [2023-11-28 20:21:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-28 20:21:46,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:46,020 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:46,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:21:46,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:46,221 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:46,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:46,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1232368290, now seen corresponding path program 1 times [2023-11-28 20:21:46,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:46,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718414506] [2023-11-28 20:21:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:46,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:46,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047538940] [2023-11-28 20:21:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:46,292 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:46,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:21:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:46,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:21:46,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:47,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:47,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718414506] [2023-11-28 20:21:47,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047538940] [2023-11-28 20:21:47,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047538940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-28 20:21:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334564844] [2023-11-28 20:21:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:21:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:21:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:21:47,377 INFO L87 Difference]: Start difference. First operand 3520 states and 5482 transitions. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 9 states have internal predecessors, (133), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:48,830 INFO L93 Difference]: Finished difference Result 6673 states and 10343 transitions. [2023-11-28 20:21:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:21:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 9 states have internal predecessors, (133), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 440 [2023-11-28 20:21:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:48,853 INFO L225 Difference]: With dead ends: 6673 [2023-11-28 20:21:48,853 INFO L226 Difference]: Without dead ends: 3712 [2023-11-28 20:21:48,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:21:48,859 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 1993 mSDsluCounter, 3290 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 4005 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:48,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 4005 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2023-11-28 20:21:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3146. [2023-11-28 20:21:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 2817 states have (on average 1.5207667731629393) internal successors, (4284), 2826 states have internal predecessors, (4284), 308 states have call successors, (308), 20 states have call predecessors, (308), 20 states have return successors, (308), 299 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-28 20:21:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 4900 transitions. [2023-11-28 20:21:49,106 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 4900 transitions. Word has length 440 [2023-11-28 20:21:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:49,106 INFO L495 AbstractCegarLoop]: Abstraction has 3146 states and 4900 transitions. [2023-11-28 20:21:49,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 9 states have internal predecessors, (133), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 4900 transitions. [2023-11-28 20:21:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-28 20:21:49,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:49,112 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:49,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:49,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:21:49,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:49,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2135923102, now seen corresponding path program 1 times [2023-11-28 20:21:49,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:49,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693921976] [2023-11-28 20:21:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:49,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211659714] [2023-11-28 20:21:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:49,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:49,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:21:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:49,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:21:49,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 2283 proven. 150 refuted. 0 times theorem prover too weak. 5131 trivial. 0 not checked. [2023-11-28 20:21:50,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-28 20:21:50,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693921976] [2023-11-28 20:21:50,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211659714] [2023-11-28 20:21:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211659714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:50,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:50,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-28 20:21:50,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050661380] [2023-11-28 20:21:50,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:50,400 INFO L87 Difference]: Start difference. First operand 3146 states and 4900 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-28 20:21:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:50,807 INFO L93 Difference]: Finished difference Result 4758 states and 7387 transitions. [2023-11-28 20:21:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:21:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 440 [2023-11-28 20:21:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:50,817 INFO L225 Difference]: With dead ends: 4758 [2023-11-28 20:21:50,817 INFO L226 Difference]: Without dead ends: 2039 [2023-11-28 20:21:50,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 872 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:21:50,822 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 802 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:50,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 963 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:21:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2023-11-28 20:21:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1858. [2023-11-28 20:21:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1570 states have (on average 1.4834394904458599) internal successors, (2329), 1573 states have internal predecessors, (2329), 266 states have call successors, (266), 21 states have call predecessors, (266), 21 states have return successors, (266), 263 states have call predecessors, (266), 266 states have call successors, (266) [2023-11-28 20:21:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 2861 transitions. [2023-11-28 20:21:50,973 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 2861 transitions. Word has length 440 [2023-11-28 20:21:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:50,974 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 2861 transitions. [2023-11-28 20:21:50,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-28 20:21:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 2861 transitions. [2023-11-28 20:21:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-28 20:21:50,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:50,978 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:50,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:21:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:21:51,179 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1203868000, now seen corresponding path program 1 times [2023-11-28 20:21:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569463334] [2023-11-28 20:21:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:51,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609136581] [2023-11-28 20:21:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:51,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:51,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:51,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:51,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:21:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:51,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:21:51,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-28 20:21:52,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:21:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569463334] [2023-11-28 20:21:52,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609136581] [2023-11-28 20:21:52,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609136581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:52,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125381285] [2023-11-28 20:21:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:52,487 INFO L87 Difference]: Start difference. First operand 1858 states and 2861 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:52,877 INFO L93 Difference]: Finished difference Result 3617 states and 5559 transitions. [2023-11-28 20:21:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:52,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 440 [2023-11-28 20:21:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:52,886 INFO L225 Difference]: With dead ends: 3617 [2023-11-28 20:21:52,887 INFO L226 Difference]: Without dead ends: 1900 [2023-11-28 20:21:52,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:21:52,892 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 330 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:52,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1264 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-11-28 20:21:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1858. [2023-11-28 20:21:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1570 states have (on average 1.481528662420382) internal successors, (2326), 1573 states have internal predecessors, (2326), 266 states have call successors, (266), 21 states have call predecessors, (266), 21 states have return successors, (266), 263 states have call predecessors, (266), 266 states have call successors, (266) [2023-11-28 20:21:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 2858 transitions. [2023-11-28 20:21:53,094 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 2858 transitions. Word has length 440 [2023-11-28 20:21:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:53,095 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 2858 transitions. [2023-11-28 20:21:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-28 20:21:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 2858 transitions. [2023-11-28 20:21:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-28 20:21:53,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:53,101 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:53,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:21:53,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:21:53,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:53,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash -754706786, now seen corresponding path program 1 times [2023-11-28 20:21:53,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:53,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325465179] [2023-11-28 20:21:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:53,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:53,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:53,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116972970] [2023-11-28 20:21:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:53,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:53,363 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:53,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:21:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:53,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:21:53,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3516 proven. 456 refuted. 0 times theorem prover too weak. 3592 trivial. 0 not checked. [2023-11-28 20:21:55,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 240 proven. 474 refuted. 0 times theorem prover too weak. 6850 trivial. 0 not checked. [2023-11-28 20:21:56,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:56,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325465179] [2023-11-28 20:21:56,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:56,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116972970] [2023-11-28 20:21:56,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116972970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:56,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:56,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-11-28 20:21:56,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925423000] [2023-11-28 20:21:56,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:56,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 20:21:56,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 20:21:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:21:56,826 INFO L87 Difference]: Start difference. First operand 1858 states and 2858 transitions. Second operand has 28 states, 26 states have (on average 8.846153846153847) internal successors, (230), 24 states have internal predecessors, (230), 9 states have call successors, (103), 5 states have call predecessors, (103), 10 states have return successors, (104), 9 states have call predecessors, (104), 9 states have call successors, (104) [2023-11-28 20:21:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:58,170 INFO L93 Difference]: Finished difference Result 3524 states and 5371 transitions. [2023-11-28 20:21:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:21:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 8.846153846153847) internal successors, (230), 24 states have internal predecessors, (230), 9 states have call successors, (103), 5 states have call predecessors, (103), 10 states have return successors, (104), 9 states have call predecessors, (104), 9 states have call successors, (104) Word has length 440 [2023-11-28 20:21:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:58,178 INFO L225 Difference]: With dead ends: 3524 [2023-11-28 20:21:58,178 INFO L226 Difference]: Without dead ends: 1960 [2023-11-28 20:21:58,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=643, Invalid=1519, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:21:58,183 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1633 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:58,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1633 Valid, 1092 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:21:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2023-11-28 20:21:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1922. [2023-11-28 20:21:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1618 states have (on average 1.4579728059332508) internal successors, (2359), 1621 states have internal predecessors, (2359), 266 states have call successors, (266), 37 states have call predecessors, (266), 37 states have return successors, (266), 263 states have call predecessors, (266), 266 states have call successors, (266) [2023-11-28 20:21:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2891 transitions. [2023-11-28 20:21:58,321 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2891 transitions. Word has length 440 [2023-11-28 20:21:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:58,322 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 2891 transitions. [2023-11-28 20:21:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 8.846153846153847) internal successors, (230), 24 states have internal predecessors, (230), 9 states have call successors, (103), 5 states have call predecessors, (103), 10 states have return successors, (104), 9 states have call predecessors, (104), 9 states have call successors, (104) [2023-11-28 20:21:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2891 transitions. [2023-11-28 20:21:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-28 20:21:58,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:58,325 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:58,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:21:58,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:21:58,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:58,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:58,526 INFO L85 PathProgramCache]: Analyzing trace with hash 591920892, now seen corresponding path program 1 times [2023-11-28 20:21:58,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:58,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674049874] [2023-11-28 20:21:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:58,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:58,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:58,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800793824] [2023-11-28 20:21:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:58,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:58,576 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:58,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:21:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:59,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:21:59,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3524 proven. 120 refuted. 0 times theorem prover too weak. 3920 trivial. 0 not checked. [2023-11-28 20:22:00,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 240 proven. 123 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2023-11-28 20:22:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:01,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674049874] [2023-11-28 20:22:01,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:22:01,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800793824] [2023-11-28 20:22:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800793824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:01,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-28 20:22:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029819282] [2023-11-28 20:22:01,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:22:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:22:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:22:01,054 INFO L87 Difference]: Start difference. First operand 1922 states and 2891 transitions. Second operand has 18 states, 17 states have (on average 14.823529411764707) internal successors, (252), 16 states have internal predecessors, (252), 6 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) [2023-11-28 20:22:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:03,209 INFO L93 Difference]: Finished difference Result 6364 states and 9488 transitions. [2023-11-28 20:22:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-28 20:22:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 14.823529411764707) internal successors, (252), 16 states have internal predecessors, (252), 6 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) Word has length 441 [2023-11-28 20:22:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:03,219 INFO L225 Difference]: With dead ends: 6364 [2023-11-28 20:22:03,219 INFO L226 Difference]: Without dead ends: 4832 [2023-11-28 20:22:03,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=922, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:22:03,223 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1543 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 3612 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:03,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 3612 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-28 20:22:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2023-11-28 20:22:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 4751. [2023-11-28 20:22:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4034 states have (on average 1.4519087754090234) internal successors, (5857), 4046 states have internal predecessors, (5857), 608 states have call successors, (608), 108 states have call predecessors, (608), 108 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-28 20:22:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 7073 transitions. [2023-11-28 20:22:03,707 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 7073 transitions. Word has length 441 [2023-11-28 20:22:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:03,707 INFO L495 AbstractCegarLoop]: Abstraction has 4751 states and 7073 transitions. [2023-11-28 20:22:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 14.823529411764707) internal successors, (252), 16 states have internal predecessors, (252), 6 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) [2023-11-28 20:22:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 7073 transitions. [2023-11-28 20:22:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-28 20:22:03,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:03,713 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:03,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:22:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:22:03,913 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:03,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash 866680506, now seen corresponding path program 1 times [2023-11-28 20:22:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:03,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202907705] [2023-11-28 20:22:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:03,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:03,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:22:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167994641] [2023-11-28 20:22:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:03,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:03,972 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:03,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:22:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:04,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 20:22:04,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 4293 proven. 333 refuted. 0 times theorem prover too weak. 2938 trivial. 0 not checked. [2023-11-28 20:22:08,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 120 proven. 243 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2023-11-28 20:22:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202907705] [2023-11-28 20:22:09,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:22:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167994641] [2023-11-28 20:22:09,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167994641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:09,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:09,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-28 20:22:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629945125] [2023-11-28 20:22:09,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-28 20:22:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-28 20:22:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:22:09,883 INFO L87 Difference]: Start difference. First operand 4751 states and 7073 transitions. Second operand has 21 states, 20 states have (on average 11.7) internal successors, (234), 19 states have internal predecessors, (234), 7 states have call successors, (104), 5 states have call predecessors, (104), 8 states have return successors, (104), 6 states have call predecessors, (104), 7 states have call successors, (104) [2023-11-28 20:22:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:13,983 INFO L93 Difference]: Finished difference Result 17857 states and 26774 transitions. [2023-11-28 20:22:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 20:22:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 11.7) internal successors, (234), 19 states have internal predecessors, (234), 7 states have call successors, (104), 5 states have call predecessors, (104), 8 states have return successors, (104), 6 states have call predecessors, (104), 7 states have call successors, (104) Word has length 441 [2023-11-28 20:22:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:14,006 INFO L225 Difference]: With dead ends: 17857 [2023-11-28 20:22:14,006 INFO L226 Difference]: Without dead ends: 13512 [2023-11-28 20:22:14,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 853 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2023-11-28 20:22:14,015 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 2030 mSDsluCounter, 4531 mSDsCounter, 0 mSdLazyCounter, 3476 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2050 SdHoareTripleChecker+Valid, 5273 SdHoareTripleChecker+Invalid, 3781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:14,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2050 Valid, 5273 Invalid, 3781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3476 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-28 20:22:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2023-11-28 20:22:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 7995. [2023-11-28 20:22:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7995 states, 7268 states have (on average 1.5158227848101267) internal successors, (11017), 7280 states have internal predecessors, (11017), 608 states have call successors, (608), 118 states have call predecessors, (608), 118 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-28 20:22:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7995 states to 7995 states and 12233 transitions. [2023-11-28 20:22:14,639 INFO L78 Accepts]: Start accepts. Automaton has 7995 states and 12233 transitions. Word has length 441 [2023-11-28 20:22:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:14,639 INFO L495 AbstractCegarLoop]: Abstraction has 7995 states and 12233 transitions. [2023-11-28 20:22:14,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 11.7) internal successors, (234), 19 states have internal predecessors, (234), 7 states have call successors, (104), 5 states have call predecessors, (104), 8 states have return successors, (104), 6 states have call predecessors, (104), 7 states have call successors, (104) [2023-11-28 20:22:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7995 states and 12233 transitions. [2023-11-28 20:22:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-28 20:22:14,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:14,646 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:14,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:22:14,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:22:14,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:14,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 385600248, now seen corresponding path program 1 times [2023-11-28 20:22:14,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:14,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628404378] [2023-11-28 20:22:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:14,894 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:22:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310304767] [2023-11-28 20:22:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:14,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:14,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:14,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:14,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:22:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:15,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:22:15,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3160 proven. 96 refuted. 0 times theorem prover too weak. 4308 trivial. 0 not checked. [2023-11-28 20:22:16,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 135 proven. 48 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-28 20:22:16,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628404378] [2023-11-28 20:22:16,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:22:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310304767] [2023-11-28 20:22:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310304767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:16,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:16,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-28 20:22:16,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130437987] [2023-11-28 20:22:16,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:22:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:22:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:22:16,374 INFO L87 Difference]: Start difference. First operand 7995 states and 12233 transitions. Second operand has 13 states, 13 states have (on average 13.923076923076923) internal successors, (181), 12 states have internal predecessors, (181), 4 states have call successors, (79), 3 states have call predecessors, (79), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-11-28 20:22:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:17,472 INFO L93 Difference]: Finished difference Result 15111 states and 23025 transitions. [2023-11-28 20:22:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:22:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.923076923076923) internal successors, (181), 12 states have internal predecessors, (181), 4 states have call successors, (79), 3 states have call predecessors, (79), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) Word has length 441 [2023-11-28 20:22:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:17,493 INFO L225 Difference]: With dead ends: 15111 [2023-11-28 20:22:17,493 INFO L226 Difference]: Without dead ends: 8149 [2023-11-28 20:22:17,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:22:17,504 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1037 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:17,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 1693 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:22:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2023-11-28 20:22:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 8051. [2023-11-28 20:22:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8051 states, 7310 states have (on average 1.5108071135430916) internal successors, (11044), 7322 states have internal predecessors, (11044), 608 states have call successors, (608), 132 states have call predecessors, (608), 132 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-28 20:22:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8051 states to 8051 states and 12260 transitions. [2023-11-28 20:22:18,101 INFO L78 Accepts]: Start accepts. Automaton has 8051 states and 12260 transitions. Word has length 441 [2023-11-28 20:22:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:18,102 INFO L495 AbstractCegarLoop]: Abstraction has 8051 states and 12260 transitions. [2023-11-28 20:22:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.923076923076923) internal successors, (181), 12 states have internal predecessors, (181), 4 states have call successors, (79), 3 states have call predecessors, (79), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-11-28 20:22:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8051 states and 12260 transitions. [2023-11-28 20:22:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-28 20:22:18,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:18,107 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:18,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:22:18,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:22:18,307 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:18,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash 587346473, now seen corresponding path program 1 times [2023-11-28 20:22:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554453725] [2023-11-28 20:22:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:18,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:18,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:22:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5104206] [2023-11-28 20:22:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:18,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:18,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:18,358 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:18,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:22:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:18,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:22:18,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 4130 proven. 216 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2023-11-28 20:22:19,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 144 proven. 219 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2023-11-28 20:22:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:19,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554453725] [2023-11-28 20:22:19,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:22:19,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5104206] [2023-11-28 20:22:19,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5104206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:19,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:19,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-28 20:22:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784897377] [2023-11-28 20:22:19,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:22:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:22:19,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:22:19,832 INFO L87 Difference]: Start difference. First operand 8051 states and 12260 transitions. Second operand has 16 states, 16 states have (on average 12.625) internal successors, (202), 16 states have internal predecessors, (202), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-28 20:22:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:20,819 INFO L93 Difference]: Finished difference Result 10673 states and 16110 transitions. [2023-11-28 20:22:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:22:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.625) internal successors, (202), 16 states have internal predecessors, (202), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) Word has length 442 [2023-11-28 20:22:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:20,825 INFO L225 Difference]: With dead ends: 10673 [2023-11-28 20:22:20,825 INFO L226 Difference]: Without dead ends: 3663 [2023-11-28 20:22:20,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:22:20,833 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 972 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:20,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 1451 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:22:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2023-11-28 20:22:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3585. [2023-11-28 20:22:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3101 states have (on average 1.471460819090616) internal successors, (4563), 3108 states have internal predecessors, (4563), 392 states have call successors, (392), 91 states have call predecessors, (392), 91 states have return successors, (392), 385 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-28 20:22:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5347 transitions. [2023-11-28 20:22:21,118 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5347 transitions. Word has length 442 [2023-11-28 20:22:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:21,118 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5347 transitions. [2023-11-28 20:22:21,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.625) internal successors, (202), 16 states have internal predecessors, (202), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-28 20:22:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5347 transitions. [2023-11-28 20:22:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-28 20:22:21,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:21,122 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:21,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-28 20:22:21,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:22:21,323 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:21,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1079972647, now seen corresponding path program 1 times [2023-11-28 20:22:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016018112] [2023-11-28 20:22:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:21,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:22:21,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830569344] [2023-11-28 20:22:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:21,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:21,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:21,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5638c270-32d8-487f-ba9b-937eb49d7718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process