./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-68.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/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_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-68.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/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_51bbb7b0-976d-49e2-93f7-8f7d763e627d/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 dfbdb21fd55678b3caf72769e3ad8794b753b2d3328f7d4564c81cc331a4c637 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:33:52,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:33:52,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:33:52,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:33:52,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:33:52,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:33:52,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:33:52,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:33:52,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:33:52,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:33:52,634 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:33:52,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:33:52,635 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:33:52,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:33:52,636 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:33:52,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:33:52,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:33:52,638 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:33:52,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:33:52,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:33:52,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:33:52,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:33:52,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:33:52,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:33:52,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:33:52,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:33:52,647 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:33:52,648 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:33:52,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:33:52,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:33:52,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:33:52,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:33:52,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:33:52,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:33:52,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:33:52,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:33:52,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:33:52,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:33:52,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:33:52,651 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:33:52,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:33:52,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:33:52,651 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_51bbb7b0-976d-49e2-93f7-8f7d763e627d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbdb21fd55678b3caf72769e3ad8794b753b2d3328f7d4564c81cc331a4c637 [2023-11-29 00:33:52,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:33:52,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:33:52,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:33:52,901 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:33:52,901 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:33:52,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-68.i [2023-11-29 00:33:55,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:33:55,924 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:33:55,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-68.i [2023-11-29 00:33:55,941 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/data/523404191/18bf1349538046f8bdaaf2dd9c52e9cb/FLAGa20dcd4aa [2023-11-29 00:33:55,955 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/data/523404191/18bf1349538046f8bdaaf2dd9c52e9cb [2023-11-29 00:33:55,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:33:55,959 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:33:55,960 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:33:55,961 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:33:55,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:33:55,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:33:55" (1/1) ... [2023-11-29 00:33:55,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc91263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:55, skipping insertion in model container [2023-11-29 00:33:55,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:33:55" (1/1) ... [2023-11-29 00:33:56,044 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:33:56,176 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_51bbb7b0-976d-49e2-93f7-8f7d763e627d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-68.i[916,929] [2023-11-29 00:33:56,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:33:56,416 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:33:56,429 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_51bbb7b0-976d-49e2-93f7-8f7d763e627d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-68.i[916,929] [2023-11-29 00:33:56,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:33:56,582 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:33:56,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56 WrapperNode [2023-11-29 00:33:56,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:33:56,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:33:56,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:33:56,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:33:56,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,718 INFO L138 Inliner]: procedures = 26, calls = 89, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 695 [2023-11-29 00:33:56,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:33:56,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:33:56,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:33:56,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:33:56,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,750 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,817 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:33:56,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,880 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:33:56,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:33:56,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:33:56,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:33:56,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (1/1) ... [2023-11-29 00:33:56,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:33:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:56,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:33:56,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:33:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:33:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:33:56,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:33:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:33:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:33:56,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:33:57,111 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:33:57,113 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:33:58,088 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:33:58,186 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:33:58,186 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:33:58,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:33:58 BoogieIcfgContainer [2023-11-29 00:33:58,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:33:58,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:33:58,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:33:58,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:33:58,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:33:55" (1/3) ... [2023-11-29 00:33:58,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec0260b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:33:58, skipping insertion in model container [2023-11-29 00:33:58,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:33:56" (2/3) ... [2023-11-29 00:33:58,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec0260b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:33:58, skipping insertion in model container [2023-11-29 00:33:58,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:33:58" (3/3) ... [2023-11-29 00:33:58,195 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-68.i [2023-11-29 00:33:58,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:33:58,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:33:58,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:33:58,279 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;@7b74a660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:33:58,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:33:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 272 states, 193 states have (on average 1.549222797927461) internal successors, (299), 194 states have internal predecessors, (299), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 00:33:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-29 00:33:58,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:58,316 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:33:58,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:58,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash -417427043, now seen corresponding path program 1 times [2023-11-29 00:33:58,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:58,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871132289] [2023-11-29 00:33:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:33:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871132289] [2023-11-29 00:33:58,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:33:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221511499] [2023-11-29 00:33:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:58,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:58,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:33:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:59,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:33:59,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:33:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2023-11-29 00:33:59,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:33:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221511499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:33:59,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:33:59,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:33:59,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781684317] [2023-11-29 00:33:59,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:33:59,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:33:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:33:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:33:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:33:59,311 INFO L87 Difference]: Start difference. First operand has 272 states, 193 states have (on average 1.549222797927461) internal successors, (299), 194 states have internal predecessors, (299), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-29 00:33:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:33:59,399 INFO L93 Difference]: Finished difference Result 541 states and 976 transitions. [2023-11-29 00:33:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:33:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) Word has length 524 [2023-11-29 00:33:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:33:59,414 INFO L225 Difference]: With dead ends: 541 [2023-11-29 00:33:59,415 INFO L226 Difference]: Without dead ends: 270 [2023-11-29 00:33:59,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:33:59,424 INFO L413 NwaCegarLoop]: 441 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, 441 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 [2023-11-29 00:33:59,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 441 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:33:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-11-29 00:33:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2023-11-29 00:33:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 192 states have (on average 1.5208333333333333) internal successors, (292), 192 states have internal predecessors, (292), 76 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-29 00:33:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 444 transitions. [2023-11-29 00:33:59,515 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 444 transitions. Word has length 524 [2023-11-29 00:33:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:33:59,516 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 444 transitions. [2023-11-29 00:33:59,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (76), 2 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-29 00:33:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 444 transitions. [2023-11-29 00:33:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-29 00:33:59,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:59,532 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:33:59,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:33:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:33:59,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:59,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -774079679, now seen corresponding path program 1 times [2023-11-29 00:33:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425312800] [2023-11-29 00:33:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:59,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:33:59,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062025139] [2023-11-29 00:33:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:59,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:59,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:59,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:34:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:00,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:34:00,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:00,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425312800] [2023-11-29 00:34:00,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062025139] [2023-11-29 00:34:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062025139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:00,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:34:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330884441] [2023-11-29 00:34:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:00,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:34:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:34:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:34:00,493 INFO L87 Difference]: Start difference. First operand 270 states and 444 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:00,629 INFO L93 Difference]: Finished difference Result 807 states and 1328 transitions. [2023-11-29 00:34:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:34:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 525 [2023-11-29 00:34:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:00,638 INFO L225 Difference]: With dead ends: 807 [2023-11-29 00:34:00,638 INFO L226 Difference]: Without dead ends: 538 [2023-11-29 00:34:00,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:34:00,641 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 427 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:00,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1106 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:34:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-29 00:34:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2023-11-29 00:34:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 381 states have (on average 1.5091863517060367) internal successors, (575), 381 states have internal predecessors, (575), 152 states have call successors, (152), 2 states have call predecessors, (152), 2 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 00:34:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 879 transitions. [2023-11-29 00:34:00,746 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 879 transitions. Word has length 525 [2023-11-29 00:34:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:00,748 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 879 transitions. [2023-11-29 00:34:00,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 879 transitions. [2023-11-29 00:34:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-29 00:34:00,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:00,755 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:00,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:34:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:00,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:00,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1134378111, now seen corresponding path program 1 times [2023-11-29 00:34:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:00,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313042430] [2023-11-29 00:34:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:01,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127957313] [2023-11-29 00:34:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:01,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:01,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:01,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:34:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:01,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:34:01,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:01,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313042430] [2023-11-29 00:34:01,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127957313] [2023-11-29 00:34:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127957313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:01,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:01,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:34:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605066222] [2023-11-29 00:34:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:01,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:34:01,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:34:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:34:01,562 INFO L87 Difference]: Start difference. First operand 536 states and 879 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:01,719 INFO L93 Difference]: Finished difference Result 1602 states and 2627 transitions. [2023-11-29 00:34:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:34:01,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 525 [2023-11-29 00:34:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:01,740 INFO L225 Difference]: With dead ends: 1602 [2023-11-29 00:34:01,740 INFO L226 Difference]: Without dead ends: 1067 [2023-11-29 00:34:01,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:34:01,744 INFO L413 NwaCegarLoop]: 802 mSDtfsCounter, 434 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:01,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1225 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:34:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2023-11-29 00:34:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1065. [2023-11-29 00:34:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 756 states have (on average 1.4947089947089947) internal successors, (1130), 756 states have internal predecessors, (1130), 304 states have call successors, (304), 4 states have call predecessors, (304), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2023-11-29 00:34:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1738 transitions. [2023-11-29 00:34:01,884 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1738 transitions. Word has length 525 [2023-11-29 00:34:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:01,886 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1738 transitions. [2023-11-29 00:34:01,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1738 transitions. [2023-11-29 00:34:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-29 00:34:01,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:01,893 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:01,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:34:02,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:02,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:02,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash 988157819, now seen corresponding path program 1 times [2023-11-29 00:34:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305578484] [2023-11-29 00:34:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:02,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746263004] [2023-11-29 00:34:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:02,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:02,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:02,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:34:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:02,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:34:02,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:03,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:03,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:03,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305578484] [2023-11-29 00:34:03,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:03,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746263004] [2023-11-29 00:34:03,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746263004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:03,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:03,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:34:03,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570366858] [2023-11-29 00:34:03,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:03,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:34:03,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:34:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:34:03,255 INFO L87 Difference]: Start difference. First operand 1065 states and 1738 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:03,659 INFO L93 Difference]: Finished difference Result 2643 states and 4316 transitions. [2023-11-29 00:34:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:34:03,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 525 [2023-11-29 00:34:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:03,674 INFO L225 Difference]: With dead ends: 2643 [2023-11-29 00:34:03,674 INFO L226 Difference]: Without dead ends: 1579 [2023-11-29 00:34:03,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:34:03,679 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 450 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:03,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1682 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:34:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-11-29 00:34:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1247. [2023-11-29 00:34:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 861 states have (on average 1.4715447154471544) internal successors, (1267), 861 states have internal predecessors, (1267), 380 states have call successors, (380), 5 states have call predecessors, (380), 5 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2023-11-29 00:34:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2027 transitions. [2023-11-29 00:34:03,909 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2027 transitions. Word has length 525 [2023-11-29 00:34:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:03,911 INFO L495 AbstractCegarLoop]: Abstraction has 1247 states and 2027 transitions. [2023-11-29 00:34:03,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2027 transitions. [2023-11-29 00:34:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:34:03,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:03,917 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:03,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:34:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:04,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash 210487795, now seen corresponding path program 1 times [2023-11-29 00:34:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492446671] [2023-11-29 00:34:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:04,204 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:04,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999969901] [2023-11-29 00:34:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:04,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:04,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:04,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:34:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:04,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:34:04,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:04,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:04,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:04,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492446671] [2023-11-29 00:34:04,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:04,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999969901] [2023-11-29 00:34:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999969901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:04,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:04,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:34:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614433445] [2023-11-29 00:34:04,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:04,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:34:04,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:34:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:34:04,707 INFO L87 Difference]: Start difference. First operand 1247 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:05,497 INFO L93 Difference]: Finished difference Result 3446 states and 5574 transitions. [2023-11-29 00:34:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:34:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 526 [2023-11-29 00:34:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:05,512 INFO L225 Difference]: With dead ends: 3446 [2023-11-29 00:34:05,512 INFO L226 Difference]: Without dead ends: 2354 [2023-11-29 00:34:05,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:34:05,517 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1164 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:05,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1032 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:34:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2023-11-29 00:34:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2344. [2023-11-29 00:34:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1637 states have (on average 1.4544899205864386) internal successors, (2381), 1641 states have internal predecessors, (2381), 692 states have call successors, (692), 14 states have call predecessors, (692), 14 states have return successors, (692), 688 states have call predecessors, (692), 692 states have call successors, (692) [2023-11-29 00:34:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3765 transitions. [2023-11-29 00:34:05,744 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3765 transitions. Word has length 526 [2023-11-29 00:34:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:05,745 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3765 transitions. [2023-11-29 00:34:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3765 transitions. [2023-11-29 00:34:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:34:05,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:05,755 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:05,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:34:05,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:05,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:05,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1247677517, now seen corresponding path program 1 times [2023-11-29 00:34:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:05,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762278911] [2023-11-29 00:34:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:06,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343856681] [2023-11-29 00:34:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:06,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:06,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:06,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:06,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:34:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:06,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:34:06,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:06,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:06,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:06,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762278911] [2023-11-29 00:34:06,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:06,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343856681] [2023-11-29 00:34:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343856681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:06,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:06,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:34:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574550186] [2023-11-29 00:34:06,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:06,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:34:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:34:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:34:06,557 INFO L87 Difference]: Start difference. First operand 2344 states and 3765 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:07,477 INFO L93 Difference]: Finished difference Result 9964 states and 15965 transitions. [2023-11-29 00:34:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:34:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 526 [2023-11-29 00:34:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:07,523 INFO L225 Difference]: With dead ends: 9964 [2023-11-29 00:34:07,523 INFO L226 Difference]: Without dead ends: 7830 [2023-11-29 00:34:07,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:34:07,532 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 1086 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:07,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 2807 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:34:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2023-11-29 00:34:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 2764. [2023-11-29 00:34:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2057 states have (on average 1.4880894506562956) internal successors, (3061), 2061 states have internal predecessors, (3061), 692 states have call successors, (692), 14 states have call predecessors, (692), 14 states have return successors, (692), 688 states have call predecessors, (692), 692 states have call successors, (692) [2023-11-29 00:34:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4445 transitions. [2023-11-29 00:34:07,934 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4445 transitions. Word has length 526 [2023-11-29 00:34:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:07,934 INFO L495 AbstractCegarLoop]: Abstraction has 2764 states and 4445 transitions. [2023-11-29 00:34:07,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4445 transitions. [2023-11-29 00:34:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:34:07,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:07,939 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:07,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:34:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:34:08,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:08,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1602221235, now seen corresponding path program 1 times [2023-11-29 00:34:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:08,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37295346] [2023-11-29 00:34:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:08,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227706110] [2023-11-29 00:34:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:08,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:08,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:34:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:08,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:34:08,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:08,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37295346] [2023-11-29 00:34:08,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227706110] [2023-11-29 00:34:08,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227706110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:08,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:08,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:34:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088768488] [2023-11-29 00:34:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:08,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:34:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:08,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:34:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:34:08,862 INFO L87 Difference]: Start difference. First operand 2764 states and 4445 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:09,873 INFO L93 Difference]: Finished difference Result 7924 states and 12701 transitions. [2023-11-29 00:34:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:34:09,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 526 [2023-11-29 00:34:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:09,902 INFO L225 Difference]: With dead ends: 7924 [2023-11-29 00:34:09,902 INFO L226 Difference]: Without dead ends: 5286 [2023-11-29 00:34:09,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:34:09,909 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 899 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:09,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 976 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:34:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2023-11-29 00:34:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 3828. [2023-11-29 00:34:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3115 states have (on average 1.524558587479936) internal successors, (4749), 3119 states have internal predecessors, (4749), 692 states have call successors, (692), 20 states have call predecessors, (692), 20 states have return successors, (692), 688 states have call predecessors, (692), 692 states have call successors, (692) [2023-11-29 00:34:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 6133 transitions. [2023-11-29 00:34:10,181 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 6133 transitions. Word has length 526 [2023-11-29 00:34:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:10,181 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 6133 transitions. [2023-11-29 00:34:10,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 6133 transitions. [2023-11-29 00:34:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-11-29 00:34:10,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:10,187 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:10,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:34:10,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:34:10,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:10,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1309717131, now seen corresponding path program 1 times [2023-11-29 00:34:10,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:10,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145069634] [2023-11-29 00:34:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:10,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:10,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746111714] [2023-11-29 00:34:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:10,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:10,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:10,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:34:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:10,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:34:10,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5755 proven. 105 refuted. 0 times theorem prover too weak. 5540 trivial. 0 not checked. [2023-11-29 00:34:11,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-29 00:34:11,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:11,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145069634] [2023-11-29 00:34:11,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:11,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746111714] [2023-11-29 00:34:11,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746111714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:34:11,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:34:11,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:34:11,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019149859] [2023-11-29 00:34:11,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:34:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:34:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:34:11,611 INFO L87 Difference]: Start difference. First operand 3828 states and 6133 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-29 00:34:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:12,378 INFO L93 Difference]: Finished difference Result 7162 states and 11461 transitions. [2023-11-29 00:34:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:34:12,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) Word has length 526 [2023-11-29 00:34:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:12,398 INFO L225 Difference]: With dead ends: 7162 [2023-11-29 00:34:12,398 INFO L226 Difference]: Without dead ends: 3524 [2023-11-29 00:34:12,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1044 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:34:12,406 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 536 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:12,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1009 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:34:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2023-11-29 00:34:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 3496. [2023-11-29 00:34:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 2936 states have (on average 1.534741144414169) internal successors, (4506), 2940 states have internal predecessors, (4506), 540 states have call successors, (540), 19 states have call predecessors, (540), 19 states have return successors, (540), 536 states have call predecessors, (540), 540 states have call successors, (540) [2023-11-29 00:34:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 5586 transitions. [2023-11-29 00:34:12,776 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 5586 transitions. Word has length 526 [2023-11-29 00:34:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:12,777 INFO L495 AbstractCegarLoop]: Abstraction has 3496 states and 5586 transitions. [2023-11-29 00:34:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-29 00:34:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 5586 transitions. [2023-11-29 00:34:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:34:12,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:12,789 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:12,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:34:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:12,990 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:12,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1347277055, now seen corresponding path program 1 times [2023-11-29 00:34:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:12,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384461601] [2023-11-29 00:34:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:12,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:13,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966998315] [2023-11-29 00:34:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:13,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:13,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:34:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:13,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:34:13,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:34:13,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:34:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:13,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384461601] [2023-11-29 00:34:13,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:13,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966998315] [2023-11-29 00:34:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966998315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:34:13,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:34:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:34:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859628489] [2023-11-29 00:34:13,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:34:13,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:34:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:34:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:34:13,515 INFO L87 Difference]: Start difference. First operand 3496 states and 5586 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:13,898 INFO L93 Difference]: Finished difference Result 8958 states and 14306 transitions. [2023-11-29 00:34:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:34:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 527 [2023-11-29 00:34:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:13,921 INFO L225 Difference]: With dead ends: 8958 [2023-11-29 00:34:13,921 INFO L226 Difference]: Without dead ends: 5710 [2023-11-29 00:34:13,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:34:13,929 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 456 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:13,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1157 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:34:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2023-11-29 00:34:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 5700. [2023-11-29 00:34:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 5044 states have (on average 1.5475812846946868) internal successors, (7806), 5056 states have internal predecessors, (7806), 628 states have call successors, (628), 27 states have call predecessors, (628), 27 states have return successors, (628), 616 states have call predecessors, (628), 628 states have call successors, (628) [2023-11-29 00:34:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 9062 transitions. [2023-11-29 00:34:14,337 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 9062 transitions. Word has length 527 [2023-11-29 00:34:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:14,338 INFO L495 AbstractCegarLoop]: Abstraction has 5700 states and 9062 transitions. [2023-11-29 00:34:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:34:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 9062 transitions. [2023-11-29 00:34:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:34:14,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:14,348 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:14,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:34:14,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:34:14,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:14,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1962978817, now seen corresponding path program 1 times [2023-11-29 00:34:14,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:14,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924046610] [2023-11-29 00:34:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:14,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:14,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878015033] [2023-11-29 00:34:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:14,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:14,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:14,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:34:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:15,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:34:15,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5269 proven. 78 refuted. 0 times theorem prover too weak. 6053 trivial. 0 not checked. [2023-11-29 00:34:15,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 147 proven. 78 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-29 00:34:15,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924046610] [2023-11-29 00:34:15,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878015033] [2023-11-29 00:34:15,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878015033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:34:15,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:34:15,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:34:15,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003813574] [2023-11-29 00:34:15,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:15,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:34:15,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:34:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:34:15,577 INFO L87 Difference]: Start difference. First operand 5700 states and 9062 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-29 00:34:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:16,182 INFO L93 Difference]: Finished difference Result 11270 states and 17884 transitions. [2023-11-29 00:34:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:34:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 527 [2023-11-29 00:34:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:16,200 INFO L225 Difference]: With dead ends: 11270 [2023-11-29 00:34:16,200 INFO L226 Difference]: Without dead ends: 5758 [2023-11-29 00:34:16,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1046 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:34:16,208 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 544 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:16,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 903 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:34:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2023-11-29 00:34:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5720. [2023-11-29 00:34:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5059 states have (on average 1.541609013639059) internal successors, (7799), 5071 states have internal predecessors, (7799), 628 states have call successors, (628), 32 states have call predecessors, (628), 32 states have return successors, (628), 616 states have call predecessors, (628), 628 states have call successors, (628) [2023-11-29 00:34:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 9055 transitions. [2023-11-29 00:34:16,578 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 9055 transitions. Word has length 527 [2023-11-29 00:34:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:16,578 INFO L495 AbstractCegarLoop]: Abstraction has 5720 states and 9055 transitions. [2023-11-29 00:34:16,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-29 00:34:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 9055 transitions. [2023-11-29 00:34:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:34:16,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:16,589 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:16,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:34:16,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:34:16,789 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:16,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1935913215, now seen corresponding path program 1 times [2023-11-29 00:34:16,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:16,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728143402] [2023-11-29 00:34:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:16,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058412738] [2023-11-29 00:34:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:16,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:16,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:16,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:34:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:17,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:34:17,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5685 proven. 126 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2023-11-29 00:34:17,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 99 proven. 126 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-29 00:34:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:18,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728143402] [2023-11-29 00:34:18,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:18,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058412738] [2023-11-29 00:34:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058412738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:34:18,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:34:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 00:34:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028304282] [2023-11-29 00:34:18,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:18,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:34:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:34:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:34:18,033 INFO L87 Difference]: Start difference. First operand 5720 states and 9055 transitions. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-29 00:34:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:18,699 INFO L93 Difference]: Finished difference Result 11388 states and 17972 transitions. [2023-11-29 00:34:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:34:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) Word has length 527 [2023-11-29 00:34:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:18,713 INFO L225 Difference]: With dead ends: 11388 [2023-11-29 00:34:18,713 INFO L226 Difference]: Without dead ends: 5812 [2023-11-29 00:34:18,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1045 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:34:18,721 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 751 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:18,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 886 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:34:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2023-11-29 00:34:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5756. [2023-11-29 00:34:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5756 states, 5086 states have (on average 1.5314589068029887) internal successors, (7789), 5098 states have internal predecessors, (7789), 628 states have call successors, (628), 41 states have call predecessors, (628), 41 states have return successors, (628), 616 states have call predecessors, (628), 628 states have call successors, (628) [2023-11-29 00:34:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 9045 transitions. [2023-11-29 00:34:19,120 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 9045 transitions. Word has length 527 [2023-11-29 00:34:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:19,121 INFO L495 AbstractCegarLoop]: Abstraction has 5756 states and 9045 transitions. [2023-11-29 00:34:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-29 00:34:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 9045 transitions. [2023-11-29 00:34:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:34:19,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:19,131 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:19,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:34:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:19,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1941657475, now seen corresponding path program 1 times [2023-11-29 00:34:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27825058] [2023-11-29 00:34:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:19,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111177968] [2023-11-29 00:34:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:19,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:19,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:19,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:34:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:19,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:34:19,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 6815 proven. 747 refuted. 0 times theorem prover too weak. 3838 trivial. 0 not checked. [2023-11-29 00:34:23,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 240 proven. 642 refuted. 0 times theorem prover too weak. 10518 trivial. 0 not checked. [2023-11-29 00:34:25,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27825058] [2023-11-29 00:34:25,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:25,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111177968] [2023-11-29 00:34:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111177968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:34:25,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:34:25,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 35 [2023-11-29 00:34:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296326559] [2023-11-29 00:34:25,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:34:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:34:25,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:34:25,968 INFO L87 Difference]: Start difference. First operand 5756 states and 9045 transitions. Second operand has 35 states, 35 states have (on average 8.628571428571428) internal successors, (302), 34 states have internal predecessors, (302), 10 states have call successors, (138), 6 states have call predecessors, (138), 14 states have return successors, (139), 10 states have call predecessors, (139), 10 states have call successors, (139) [2023-11-29 00:34:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:34:32,179 INFO L93 Difference]: Finished difference Result 23168 states and 35969 transitions. [2023-11-29 00:34:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 00:34:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.628571428571428) internal successors, (302), 34 states have internal predecessors, (302), 10 states have call successors, (138), 6 states have call predecessors, (138), 14 states have return successors, (139), 10 states have call predecessors, (139), 10 states have call successors, (139) Word has length 527 [2023-11-29 00:34:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:34:32,229 INFO L225 Difference]: With dead ends: 23168 [2023-11-29 00:34:32,229 INFO L226 Difference]: Without dead ends: 17668 [2023-11-29 00:34:32,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1030 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2872, Invalid=9784, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 00:34:32,249 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 4289 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4302 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:34:32,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4302 Valid, 2696 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 00:34:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17668 states. [2023-11-29 00:34:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17668 to 16622. [2023-11-29 00:34:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16622 states, 15111 states have (on average 1.534775990999934) internal successors, (23192), 15163 states have internal predecessors, (23192), 1328 states have call successors, (1328), 182 states have call predecessors, (1328), 182 states have return successors, (1328), 1276 states have call predecessors, (1328), 1328 states have call successors, (1328) [2023-11-29 00:34:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16622 states to 16622 states and 25848 transitions. [2023-11-29 00:34:33,272 INFO L78 Accepts]: Start accepts. Automaton has 16622 states and 25848 transitions. Word has length 527 [2023-11-29 00:34:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:34:33,272 INFO L495 AbstractCegarLoop]: Abstraction has 16622 states and 25848 transitions. [2023-11-29 00:34:33,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.628571428571428) internal successors, (302), 34 states have internal predecessors, (302), 10 states have call successors, (138), 6 states have call predecessors, (138), 14 states have return successors, (139), 10 states have call predecessors, (139), 10 states have call successors, (139) [2023-11-29 00:34:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 16622 states and 25848 transitions. [2023-11-29 00:34:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:34:33,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:34:33,294 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:34:33,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:34:33,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:33,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:34:33,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:34:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 136219141, now seen corresponding path program 1 times [2023-11-29 00:34:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:34:33,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496052654] [2023-11-29 00:34:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:33,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:34:33,567 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:34:33,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743108936] [2023-11-29 00:34:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:34:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:34:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:34:33,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:34:33,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:34:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:34:34,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 00:34:34,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:34:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 8753 proven. 696 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2023-11-29 00:34:38,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:34:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 456 proven. 426 refuted. 0 times theorem prover too weak. 10518 trivial. 0 not checked. [2023-11-29 00:34:46,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:34:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496052654] [2023-11-29 00:34:46,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:34:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743108936] [2023-11-29 00:34:46,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743108936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:34:46,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:34:46,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 53 [2023-11-29 00:34:46,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285527479] [2023-11-29 00:34:46,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:34:46,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:34:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:34:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:34:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=2168, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:34:46,762 INFO L87 Difference]: Start difference. First operand 16622 states and 25848 transitions. Second operand has 53 states, 51 states have (on average 6.254901960784314) internal successors, (319), 51 states have internal predecessors, (319), 14 states have call successors, (140), 8 states have call predecessors, (140), 16 states have return successors, (141), 12 states have call predecessors, (141), 14 states have call successors, (141) [2023-11-29 00:35:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:35:19,448 INFO L93 Difference]: Finished difference Result 90664 states and 139118 transitions. [2023-11-29 00:35:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2023-11-29 00:35:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 6.254901960784314) internal successors, (319), 51 states have internal predecessors, (319), 14 states have call successors, (140), 8 states have call predecessors, (140), 16 states have return successors, (141), 12 states have call predecessors, (141), 14 states have call successors, (141) Word has length 527 [2023-11-29 00:35:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:35:19,542 INFO L225 Difference]: With dead ends: 90664 [2023-11-29 00:35:19,542 INFO L226 Difference]: Without dead ends: 74424 [2023-11-29 00:35:19,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14716 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=7922, Invalid=34308, Unknown=0, NotChecked=0, Total=42230 [2023-11-29 00:35:19,583 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 11769 mSDsluCounter, 3889 mSDsCounter, 0 mSdLazyCounter, 5836 mSolverCounterSat, 1737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11780 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 7573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1737 IncrementalHoareTripleChecker+Valid, 5836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:35:19,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11780 Valid, 4334 Invalid, 7573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1737 Valid, 5836 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-11-29 00:35:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74424 states. [2023-11-29 00:35:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74424 to 11844. [2023-11-29 00:35:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11844 states, 10665 states have (on average 1.5049226441631505) internal successors, (16050), 10681 states have internal predecessors, (16050), 916 states have call successors, (916), 262 states have call predecessors, (916), 262 states have return successors, (916), 900 states have call predecessors, (916), 916 states have call successors, (916) [2023-11-29 00:35:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11844 states to 11844 states and 17882 transitions. [2023-11-29 00:35:21,468 INFO L78 Accepts]: Start accepts. Automaton has 11844 states and 17882 transitions. Word has length 527 [2023-11-29 00:35:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:35:21,469 INFO L495 AbstractCegarLoop]: Abstraction has 11844 states and 17882 transitions. [2023-11-29 00:35:21,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 6.254901960784314) internal successors, (319), 51 states have internal predecessors, (319), 14 states have call successors, (140), 8 states have call predecessors, (140), 16 states have return successors, (141), 12 states have call predecessors, (141), 14 states have call successors, (141) [2023-11-29 00:35:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 11844 states and 17882 transitions. [2023-11-29 00:35:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 00:35:21,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:35:21,480 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:21,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:35:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:21,681 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:35:21,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 723025155, now seen corresponding path program 1 times [2023-11-29 00:35:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942124267] [2023-11-29 00:35:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:21,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:35:21,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172796567] [2023-11-29 00:35:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:21,749 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:21,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:35:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:22,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:35:22,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11400 trivial. 0 not checked. [2023-11-29 00:35:23,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942124267] [2023-11-29 00:35:23,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:35:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172796567] [2023-11-29 00:35:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172796567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:23,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:35:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278088175] [2023-11-29 00:35:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:35:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:35:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:35:23,791 INFO L87 Difference]: Start difference. First operand 11844 states and 17882 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:35:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:35:25,554 INFO L93 Difference]: Finished difference Result 28507 states and 43462 transitions. [2023-11-29 00:35:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:35:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) Word has length 527 [2023-11-29 00:35:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:35:25,581 INFO L225 Difference]: With dead ends: 28507 [2023-11-29 00:35:25,582 INFO L226 Difference]: Without dead ends: 16874 [2023-11-29 00:35:25,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:35:25,592 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 324 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:35:25,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1560 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:35:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16874 states. [2023-11-29 00:35:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16874 to 11844. [2023-11-29 00:35:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11844 states, 10665 states have (on average 1.5048288795124238) internal successors, (16049), 10681 states have internal predecessors, (16049), 916 states have call successors, (916), 262 states have call predecessors, (916), 262 states have return successors, (916), 900 states have call predecessors, (916), 916 states have call successors, (916) [2023-11-29 00:35:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11844 states to 11844 states and 17881 transitions. [2023-11-29 00:35:27,029 INFO L78 Accepts]: Start accepts. Automaton has 11844 states and 17881 transitions. Word has length 527 [2023-11-29 00:35:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:35:27,030 INFO L495 AbstractCegarLoop]: Abstraction has 11844 states and 17881 transitions. [2023-11-29 00:35:27,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (76), 1 states have call predecessors, (76), 1 states have return successors, (76), 1 states have call predecessors, (76), 1 states have call successors, (76) [2023-11-29 00:35:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 11844 states and 17881 transitions. [2023-11-29 00:35:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:35:27,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:35:27,041 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:27,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:35:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:35:27,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:35:27,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -400187116, now seen corresponding path program 1 times [2023-11-29 00:35:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917004580] [2023-11-29 00:35:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:27,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:35:27,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531319744] [2023-11-29 00:35:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:27,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:27,325 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:35:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:28,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:35:28,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 945 proven. 216 refuted. 0 times theorem prover too weak. 10239 trivial. 0 not checked. [2023-11-29 00:35:29,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 9 proven. 216 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-29 00:35:30,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:30,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917004580] [2023-11-29 00:35:30,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:35:30,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531319744] [2023-11-29 00:35:30,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531319744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:30,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:30,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 00:35:30,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803591348] [2023-11-29 00:35:30,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:30,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:35:30,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:35:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:35:30,010 INFO L87 Difference]: Start difference. First operand 11844 states and 17881 transitions. Second operand has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) [2023-11-29 00:35:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:35:31,944 INFO L93 Difference]: Finished difference Result 23660 states and 35637 transitions. [2023-11-29 00:35:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:35:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) Word has length 528 [2023-11-29 00:35:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:35:31,964 INFO L225 Difference]: With dead ends: 23660 [2023-11-29 00:35:31,964 INFO L226 Difference]: Without dead ends: 12036 [2023-11-29 00:35:31,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:35:31,974 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1238 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:35:31,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 874 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:35:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12036 states. [2023-11-29 00:35:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12036 to 11928. [2023-11-29 00:35:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11928 states, 10728 states have (on average 1.5011185682326622) internal successors, (16104), 10744 states have internal predecessors, (16104), 916 states have call successors, (916), 283 states have call predecessors, (916), 283 states have return successors, (916), 900 states have call predecessors, (916), 916 states have call successors, (916) [2023-11-29 00:35:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11928 states to 11928 states and 17936 transitions. [2023-11-29 00:35:33,392 INFO L78 Accepts]: Start accepts. Automaton has 11928 states and 17936 transitions. Word has length 528 [2023-11-29 00:35:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:35:33,393 INFO L495 AbstractCegarLoop]: Abstraction has 11928 states and 17936 transitions. [2023-11-29 00:35:33,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 4 states have call successors, (152), 3 states have call predecessors, (152), 5 states have return successors, (152), 4 states have call predecessors, (152), 4 states have call successors, (152) [2023-11-29 00:35:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 11928 states and 17936 transitions. [2023-11-29 00:35:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:35:33,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:35:33,405 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:33,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:35:33,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:35:33,606 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:35:33,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1936205394, now seen corresponding path program 1 times [2023-11-29 00:35:33,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:33,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261977443] [2023-11-29 00:35:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:33,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:35:33,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061388918] [2023-11-29 00:35:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:33,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:33,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:35:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:34,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:35:34,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 8462 proven. 483 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2023-11-29 00:35:36,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 288 proven. 378 refuted. 0 times theorem prover too weak. 10734 trivial. 0 not checked. [2023-11-29 00:35:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261977443] [2023-11-29 00:35:39,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:35:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061388918] [2023-11-29 00:35:39,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061388918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:39,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:39,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2023-11-29 00:35:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936479725] [2023-11-29 00:35:39,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:35:39,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:35:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:35:39,300 INFO L87 Difference]: Start difference. First operand 11928 states and 17936 transitions. Second operand has 32 states, 32 states have (on average 8.0) internal successors, (256), 32 states have internal predecessors, (256), 9 states have call successors, (140), 5 states have call predecessors, (140), 12 states have return successors, (141), 9 states have call predecessors, (141), 9 states have call successors, (141) [2023-11-29 00:35:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:35:44,915 INFO L93 Difference]: Finished difference Result 36799 states and 55986 transitions. [2023-11-29 00:35:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:35:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.0) internal successors, (256), 32 states have internal predecessors, (256), 9 states have call successors, (140), 5 states have call predecessors, (140), 12 states have return successors, (141), 9 states have call predecessors, (141), 9 states have call successors, (141) Word has length 528 [2023-11-29 00:35:44,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:35:44,948 INFO L225 Difference]: With dead ends: 36799 [2023-11-29 00:35:44,948 INFO L226 Difference]: Without dead ends: 25259 [2023-11-29 00:35:44,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1026 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=838, Invalid=2242, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:35:44,959 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 2861 mSDsluCounter, 2919 mSDsCounter, 0 mSdLazyCounter, 2773 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2872 SdHoareTripleChecker+Valid, 3220 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:35:44,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2872 Valid, 3220 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2773 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 00:35:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25259 states. [2023-11-29 00:35:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25259 to 13279. [2023-11-29 00:35:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13279 states, 12074 states have (on average 1.5001656451880072) internal successors, (18113), 12090 states have internal predecessors, (18113), 916 states have call successors, (916), 288 states have call predecessors, (916), 288 states have return successors, (916), 900 states have call predecessors, (916), 916 states have call successors, (916) [2023-11-29 00:35:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13279 states to 13279 states and 19945 transitions. [2023-11-29 00:35:46,579 INFO L78 Accepts]: Start accepts. Automaton has 13279 states and 19945 transitions. Word has length 528 [2023-11-29 00:35:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:35:46,580 INFO L495 AbstractCegarLoop]: Abstraction has 13279 states and 19945 transitions. [2023-11-29 00:35:46,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.0) internal successors, (256), 32 states have internal predecessors, (256), 9 states have call successors, (140), 5 states have call predecessors, (140), 12 states have return successors, (141), 9 states have call predecessors, (141), 9 states have call successors, (141) [2023-11-29 00:35:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 13279 states and 19945 transitions. [2023-11-29 00:35:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:35:46,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:35:46,590 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:46,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:35:46,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:46,791 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:35:46,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash -367279470, now seen corresponding path program 1 times [2023-11-29 00:35:46,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:46,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606420637] [2023-11-29 00:35:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:46,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:46,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:35:46,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647095831] [2023-11-29 00:35:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:46,869 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:46,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:35:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:47,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:35:47,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5486 proven. 318 refuted. 0 times theorem prover too weak. 5596 trivial. 0 not checked. [2023-11-29 00:35:50,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 126 proven. 321 refuted. 0 times theorem prover too weak. 10953 trivial. 0 not checked. [2023-11-29 00:35:50,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:50,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606420637] [2023-11-29 00:35:50,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:35:50,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647095831] [2023-11-29 00:35:50,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647095831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:50,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:50,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-29 00:35:50,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070915698] [2023-11-29 00:35:50,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:50,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:35:50,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:35:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:35:50,981 INFO L87 Difference]: Start difference. First operand 13279 states and 19945 transitions. Second operand has 23 states, 23 states have (on average 13.391304347826088) internal successors, (308), 23 states have internal predecessors, (308), 6 states have call successors, (152), 4 states have call predecessors, (152), 8 states have return successors, (152), 6 states have call predecessors, (152), 6 states have call successors, (152) [2023-11-29 00:36:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:36:04,046 INFO L93 Difference]: Finished difference Result 76087 states and 114968 transitions. [2023-11-29 00:36:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 00:36:04,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 13.391304347826088) internal successors, (308), 23 states have internal predecessors, (308), 6 states have call successors, (152), 4 states have call predecessors, (152), 8 states have return successors, (152), 6 states have call predecessors, (152), 6 states have call successors, (152) Word has length 528 [2023-11-29 00:36:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:36:04,132 INFO L225 Difference]: With dead ends: 76087 [2023-11-29 00:36:04,132 INFO L226 Difference]: Without dead ends: 63369 [2023-11-29 00:36:04,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1039 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1188, Invalid=4068, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:36:04,156 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 3362 mSDsluCounter, 6468 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 7293 SdHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:36:04,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3419 Valid, 7293 Invalid, 4837 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1045 Valid, 3792 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 00:36:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63369 states. [2023-11-29 00:36:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63369 to 43979. [2023-11-29 00:36:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43979 states, 40623 states have (on average 1.5112128597100165) internal successors, (61390), 40695 states have internal predecessors, (61390), 2476 states have call successors, (2476), 879 states have call predecessors, (2476), 879 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2023-11-29 00:36:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43979 states to 43979 states and 66342 transitions. [2023-11-29 00:36:08,994 INFO L78 Accepts]: Start accepts. Automaton has 43979 states and 66342 transitions. Word has length 528 [2023-11-29 00:36:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:36:08,995 INFO L495 AbstractCegarLoop]: Abstraction has 43979 states and 66342 transitions. [2023-11-29 00:36:08,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.391304347826088) internal successors, (308), 23 states have internal predecessors, (308), 6 states have call successors, (152), 4 states have call predecessors, (152), 8 states have return successors, (152), 6 states have call predecessors, (152), 6 states have call successors, (152) [2023-11-29 00:36:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 43979 states and 66342 transitions. [2023-11-29 00:36:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-29 00:36:09,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:36:09,010 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:09,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:36:09,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:36:09,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:36:09,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 76621204, now seen corresponding path program 1 times [2023-11-29 00:36:09,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:09,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693657806] [2023-11-29 00:36:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:09,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:09,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804925510] [2023-11-29 00:36:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:09,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:09,276 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:09,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:36:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:09,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:36:09,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 3389 proven. 366 refuted. 0 times theorem prover too weak. 7645 trivial. 0 not checked. [2023-11-29 00:36:11,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 39 proven. 186 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-29 00:36:11,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693657806] [2023-11-29 00:36:11,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:11,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804925510] [2023-11-29 00:36:11,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804925510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:11,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:11,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-11-29 00:36:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752586475] [2023-11-29 00:36:11,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:36:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:36:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:36:11,398 INFO L87 Difference]: Start difference. First operand 43979 states and 66342 transitions. Second operand has 12 states, 12 states have (on average 22.416666666666668) internal successors, (269), 12 states have internal predecessors, (269), 3 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) [2023-11-29 00:36:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:36:16,835 INFO L93 Difference]: Finished difference Result 87139 states and 131309 transitions. [2023-11-29 00:36:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:36:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 22.416666666666668) internal successors, (269), 12 states have internal predecessors, (269), 3 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) Word has length 528 [2023-11-29 00:36:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:36:16,886 INFO L225 Difference]: With dead ends: 87139 [2023-11-29 00:36:16,886 INFO L226 Difference]: Without dead ends: 44345 [2023-11-29 00:36:16,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1044 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:36:16,908 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 467 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:36:16,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 831 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:36:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44345 states. [2023-11-29 00:36:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44345 to 43979. [2023-11-29 00:36:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43979 states, 40623 states have (on average 1.4997907589296704) internal successors, (60926), 40695 states have internal predecessors, (60926), 2476 states have call successors, (2476), 879 states have call predecessors, (2476), 879 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2023-11-29 00:36:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43979 states to 43979 states and 65878 transitions. [2023-11-29 00:36:21,461 INFO L78 Accepts]: Start accepts. Automaton has 43979 states and 65878 transitions. Word has length 528 [2023-11-29 00:36:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:36:21,462 INFO L495 AbstractCegarLoop]: Abstraction has 43979 states and 65878 transitions. [2023-11-29 00:36:21,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.416666666666668) internal successors, (269), 12 states have internal predecessors, (269), 3 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) [2023-11-29 00:36:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 43979 states and 65878 transitions. [2023-11-29 00:36:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-29 00:36:21,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:36:21,476 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:21,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:36:21,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:36:21,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:36:21,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1370304285, now seen corresponding path program 1 times [2023-11-29 00:36:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899208561] [2023-11-29 00:36:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:21,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:21,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166907283] [2023-11-29 00:36:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:21,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:21,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:21,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:36:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:22,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:36:22,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 4239 proven. 384 refuted. 0 times theorem prover too weak. 6777 trivial. 0 not checked. [2023-11-29 00:36:24,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 54 proven. 171 refuted. 0 times theorem prover too weak. 11175 trivial. 0 not checked. [2023-11-29 00:36:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899208561] [2023-11-29 00:36:25,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166907283] [2023-11-29 00:36:25,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166907283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:25,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:25,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-11-29 00:36:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044285725] [2023-11-29 00:36:25,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:25,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:36:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:36:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:36:25,597 INFO L87 Difference]: Start difference. First operand 43979 states and 65878 transitions. Second operand has 16 states, 16 states have (on average 18.125) internal successors, (290), 16 states have internal predecessors, (290), 4 states have call successors, (148), 3 states have call predecessors, (148), 6 states have return successors, (149), 4 states have call predecessors, (149), 4 states have call successors, (149) [2023-11-29 00:36:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:36:57,410 INFO L93 Difference]: Finished difference Result 220605 states and 323225 transitions. [2023-11-29 00:36:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 00:36:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.125) internal successors, (290), 16 states have internal predecessors, (290), 4 states have call successors, (148), 3 states have call predecessors, (148), 6 states have return successors, (149), 4 states have call predecessors, (149), 4 states have call successors, (149) Word has length 529 [2023-11-29 00:36:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:36:57,623 INFO L225 Difference]: With dead ends: 220605 [2023-11-29 00:36:57,623 INFO L226 Difference]: Without dead ends: 177811 [2023-11-29 00:36:57,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1668, Invalid=6342, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 00:36:57,659 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 3152 mSDsluCounter, 3464 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3153 SdHoareTripleChecker+Valid, 4270 SdHoareTripleChecker+Invalid, 4163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:36:57,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3153 Valid, 4270 Invalid, 4163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 3121 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 00:36:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177811 states. [2023-11-29 00:37:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177811 to 63223. [2023-11-29 00:37:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63223 states, 57971 states have (on average 1.4805678701419676) internal successors, (85830), 58075 states have internal predecessors, (85830), 3876 states have call successors, (3876), 1375 states have call predecessors, (3876), 1375 states have return successors, (3876), 3772 states have call predecessors, (3876), 3876 states have call successors, (3876) [2023-11-29 00:37:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63223 states to 63223 states and 93582 transitions. [2023-11-29 00:37:06,205 INFO L78 Accepts]: Start accepts. Automaton has 63223 states and 93582 transitions. Word has length 529 [2023-11-29 00:37:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:06,205 INFO L495 AbstractCegarLoop]: Abstraction has 63223 states and 93582 transitions. [2023-11-29 00:37:06,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.125) internal successors, (290), 16 states have internal predecessors, (290), 4 states have call successors, (148), 3 states have call predecessors, (148), 6 states have return successors, (149), 4 states have call predecessors, (149), 4 states have call successors, (149) [2023-11-29 00:37:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 63223 states and 93582 transitions. [2023-11-29 00:37:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:37:06,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:06,217 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:06,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:37:06,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:06,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:06,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:06,418 INFO L85 PathProgramCache]: Analyzing trace with hash -539171264, now seen corresponding path program 1 times [2023-11-29 00:37:06,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:06,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778397252] [2023-11-29 00:37:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:06,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:06,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:37:06,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857227882] [2023-11-29 00:37:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:06,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:06,481 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:06,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:37:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:07,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:37:07,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5643 proven. 874 refuted. 0 times theorem prover too weak. 4883 trivial. 0 not checked. [2023-11-29 00:37:09,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 234 proven. 648 refuted. 0 times theorem prover too weak. 10518 trivial. 0 not checked. [2023-11-29 00:37:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778397252] [2023-11-29 00:37:10,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:37:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857227882] [2023-11-29 00:37:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857227882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:10,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:37:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2023-11-29 00:37:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385757492] [2023-11-29 00:37:10,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:37:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:37:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:37:10,902 INFO L87 Difference]: Start difference. First operand 63223 states and 93582 transitions. Second operand has 32 states, 30 states have (on average 8.866666666666667) internal successors, (266), 28 states have internal predecessors, (266), 10 states have call successors, (152), 6 states have call predecessors, (152), 12 states have return successors, (152), 10 states have call predecessors, (152), 10 states have call successors, (152) [2023-11-29 00:37:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:19,726 INFO L93 Difference]: Finished difference Result 126701 states and 187081 transitions. [2023-11-29 00:37:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:37:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 8.866666666666667) internal successors, (266), 28 states have internal predecessors, (266), 10 states have call successors, (152), 6 states have call predecessors, (152), 12 states have return successors, (152), 10 states have call predecessors, (152), 10 states have call successors, (152) Word has length 530 [2023-11-29 00:37:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:19,801 INFO L225 Difference]: With dead ends: 126701 [2023-11-29 00:37:19,801 INFO L226 Difference]: Without dead ends: 64075 [2023-11-29 00:37:19,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1032 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=805, Invalid=1745, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:37:19,834 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1567 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:19,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1567 Valid, 1830 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:37:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64075 states. [2023-11-29 00:37:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64075 to 59915. [2023-11-29 00:37:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59915 states, 55349 states have (on average 1.4741368407739976) internal successors, (81592), 55429 states have internal predecessors, (81592), 3308 states have call successors, (3308), 1257 states have call predecessors, (3308), 1257 states have return successors, (3308), 3228 states have call predecessors, (3308), 3308 states have call successors, (3308) [2023-11-29 00:37:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59915 states to 59915 states and 88208 transitions. [2023-11-29 00:37:26,661 INFO L78 Accepts]: Start accepts. Automaton has 59915 states and 88208 transitions. Word has length 530 [2023-11-29 00:37:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:26,662 INFO L495 AbstractCegarLoop]: Abstraction has 59915 states and 88208 transitions. [2023-11-29 00:37:26,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 8.866666666666667) internal successors, (266), 28 states have internal predecessors, (266), 10 states have call successors, (152), 6 states have call predecessors, (152), 12 states have return successors, (152), 10 states have call predecessors, (152), 10 states have call successors, (152) [2023-11-29 00:37:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 59915 states and 88208 transitions. [2023-11-29 00:37:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-29 00:37:26,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:26,673 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:26,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:37:26,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:26,874 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:26,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1506521918, now seen corresponding path program 1 times [2023-11-29 00:37:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:26,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255265808] [2023-11-29 00:37:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:26,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:26,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:37:26,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639298516] [2023-11-29 00:37:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:26,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:26,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:26,922 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:26,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51bbb7b0-976d-49e2-93f7-8f7d763e627d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process