./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-43.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_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-43.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f3d7c99d022d8509e68f89579042bc1fecba07028d59ece346230f0791ea7f9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:08,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:08,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:08,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:08,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:08,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:08,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:08,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:08,321 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:08,326 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:08,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:08,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:08,329 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:08,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:08,332 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:08,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:08,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:08,334 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:08,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:08,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:08,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:08,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:08,337 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:08,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:08,338 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:08,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:08,339 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:08,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:08,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:08,341 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:08,343 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:08,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:08,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:08,344 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:08,344 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:08,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:08,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:08,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:08,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:08,346 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:08,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:08,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:08,348 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_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f3d7c99d022d8509e68f89579042bc1fecba07028d59ece346230f0791ea7f9 [2023-11-26 10:48:08,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:08,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:08,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:08,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:08,675 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:08,676 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-43.i [2023-11-26 10:48:12,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:12,427 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:12,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-43.i [2023-11-26 10:48:12,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/data/f03eca9e2/9081db7bf4da4cc18702a13c7286a954/FLAGecccf8101 [2023-11-26 10:48:12,495 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/data/f03eca9e2/9081db7bf4da4cc18702a13c7286a954 [2023-11-26 10:48:12,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:12,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:12,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:12,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:12,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:12,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:12" (1/1) ... [2023-11-26 10:48:12,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc5d042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:12, skipping insertion in model container [2023-11-26 10:48:12,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:12" (1/1) ... [2023-11-26 10:48:12,614 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:12,848 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_da951c6c-7b17-45d2-be03-454bfa6ac0da/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-43.i[916,929] [2023-11-26 10:48:13,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:13,293 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:13,319 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_da951c6c-7b17-45d2-be03-454bfa6ac0da/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-43.i[916,929] [2023-11-26 10:48:13,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:13,455 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:13,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13 WrapperNode [2023-11-26 10:48:13,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:13,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:13,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:13,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:13,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,629 INFO L138 Inliner]: procedures = 26, calls = 87, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 765 [2023-11-26 10:48:13,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:13,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:13,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:13,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:13,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,659 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,768 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:48:13,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,839 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:13,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:13,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:13,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:13,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (1/1) ... [2023-11-26 10:48:13,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:13,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:13,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:13,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:48:13,958 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:48:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:13,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:14,190 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:14,193 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:15,687 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:15,763 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:15,763 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:48:15,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:15 BoogieIcfgContainer [2023-11-26 10:48:15,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:15,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:15,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:15,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:15,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:12" (1/3) ... [2023-11-26 10:48:15,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a77ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:15, skipping insertion in model container [2023-11-26 10:48:15,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:13" (2/3) ... [2023-11-26 10:48:15,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a77ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:15, skipping insertion in model container [2023-11-26 10:48:15,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:15" (3/3) ... [2023-11-26 10:48:15,783 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-43.i [2023-11-26 10:48:15,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:15,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:15,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:15,891 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;@13162a06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:15,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 225 states have (on average 1.6133333333333333) internal successors, (363), 226 states have internal predecessors, (363), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-26 10:48:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:48:15,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:15,934 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:15,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:15,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash 955684414, now seen corresponding path program 1 times [2023-11-26 10:48:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:15,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563279746] [2023-11-26 10:48:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:16,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563279746] [2023-11-26 10:48:16,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:48:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376682799] [2023-11-26 10:48:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:16,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:16,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:17,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:48:17,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2023-11-26 10:48:17,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376682799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:17,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:17,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:48:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511922831] [2023-11-26 10:48:17,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:48:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:48:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:17,274 INFO L87 Difference]: Start difference. First operand has 302 states, 225 states have (on average 1.6133333333333333) internal successors, (363), 226 states have internal predecessors, (363), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-26 10:48:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:17,420 INFO L93 Difference]: Finished difference Result 601 states and 1094 transitions. [2023-11-26 10:48:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:48:17,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 2 states have call successors, (74) Word has length 497 [2023-11-26 10:48:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:17,438 INFO L225 Difference]: With dead ends: 601 [2023-11-26 10:48:17,438 INFO L226 Difference]: Without dead ends: 300 [2023-11-26 10:48:17,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:17,451 INFO L413 NwaCegarLoop]: 502 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, 502 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 [2023-11-26 10:48:17,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 502 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-26 10:48:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2023-11-26 10:48:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 224 states have (on average 1.59375) internal successors, (357), 224 states have internal predecessors, (357), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-26 10:48:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 505 transitions. [2023-11-26 10:48:17,594 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 505 transitions. Word has length 497 [2023-11-26 10:48:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:17,597 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 505 transitions. [2023-11-26 10:48:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-26 10:48:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 505 transitions. [2023-11-26 10:48:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:48:17,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:17,628 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:17,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:48:17,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:48:17,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:17,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1879191062, now seen corresponding path program 1 times [2023-11-26 10:48:17,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:17,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912381012] [2023-11-26 10:48:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:17,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:18,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:18,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645131553] [2023-11-26 10:48:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:18,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:18,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:18,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:48:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:18,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:48:18,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:48:18,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:18,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:18,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912381012] [2023-11-26 10:48:18,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645131553] [2023-11-26 10:48:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645131553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:18,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:18,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476466502] [2023-11-26 10:48:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:18,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:48:18,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:18,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:48:18,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:18,799 INFO L87 Difference]: Start difference. First operand 300 states and 505 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:19,013 INFO L93 Difference]: Finished difference Result 898 states and 1513 transitions. [2023-11-26 10:48:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:48:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 497 [2023-11-26 10:48:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:19,025 INFO L225 Difference]: With dead ends: 898 [2023-11-26 10:48:19,025 INFO L226 Difference]: Without dead ends: 599 [2023-11-26 10:48:19,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:19,030 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 460 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:19,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1348 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2023-11-26 10:48:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 379. [2023-11-26 10:48:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 303 states have (on average 1.646864686468647) internal successors, (499), 303 states have internal predecessors, (499), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-26 10:48:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 647 transitions. [2023-11-26 10:48:19,094 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 647 transitions. Word has length 497 [2023-11-26 10:48:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:19,099 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 647 transitions. [2023-11-26 10:48:19,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 647 transitions. [2023-11-26 10:48:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:48:19,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:19,114 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:19,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:19,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:19,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:19,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 663037336, now seen corresponding path program 1 times [2023-11-26 10:48:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:19,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742090854] [2023-11-26 10:48:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:19,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380189117] [2023-11-26 10:48:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:19,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:48:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:20,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:48:20,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:48:20,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742090854] [2023-11-26 10:48:20,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380189117] [2023-11-26 10:48:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380189117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:20,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:20,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801804121] [2023-11-26 10:48:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:20,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:48:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:48:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:20,089 INFO L87 Difference]: Start difference. First operand 379 states and 647 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:20,243 INFO L93 Difference]: Finished difference Result 1002 states and 1714 transitions. [2023-11-26 10:48:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:48:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 497 [2023-11-26 10:48:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:20,252 INFO L225 Difference]: With dead ends: 1002 [2023-11-26 10:48:20,252 INFO L226 Difference]: Without dead ends: 624 [2023-11-26 10:48:20,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:20,255 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 278 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:20,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 994 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2023-11-26 10:48:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 621. [2023-11-26 10:48:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 536 states have (on average 1.6735074626865671) internal successors, (897), 537 states have internal predecessors, (897), 82 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-26 10:48:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1061 transitions. [2023-11-26 10:48:20,309 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1061 transitions. Word has length 497 [2023-11-26 10:48:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:20,311 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 1061 transitions. [2023-11-26 10:48:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1061 transitions. [2023-11-26 10:48:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:48:20,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:20,323 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:20,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:20,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:20,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:20,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1265182864, now seen corresponding path program 1 times [2023-11-26 10:48:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:20,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575626927] [2023-11-26 10:48:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:20,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:20,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:20,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523092538] [2023-11-26 10:48:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:20,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:20,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:20,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:20,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:48:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:21,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:48:21,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:48:21,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:21,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:21,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575626927] [2023-11-26 10:48:21,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:21,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523092538] [2023-11-26 10:48:21,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523092538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:21,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:21,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:48:21,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696160546] [2023-11-26 10:48:21,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:21,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:48:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:48:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:21,309 INFO L87 Difference]: Start difference. First operand 621 states and 1061 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:21,447 INFO L93 Difference]: Finished difference Result 1546 states and 2616 transitions. [2023-11-26 10:48:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:48:21,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 497 [2023-11-26 10:48:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:21,461 INFO L225 Difference]: With dead ends: 1546 [2023-11-26 10:48:21,461 INFO L226 Difference]: Without dead ends: 926 [2023-11-26 10:48:21,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:48:21,465 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 493 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:21,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1334 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-26 10:48:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 920. [2023-11-26 10:48:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 751 states have (on average 1.6178428761651131) internal successors, (1215), 753 states have internal predecessors, (1215), 164 states have call successors, (164), 4 states have call predecessors, (164), 4 states have return successors, (164), 162 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-26 10:48:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1543 transitions. [2023-11-26 10:48:21,604 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1543 transitions. Word has length 497 [2023-11-26 10:48:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:21,606 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1543 transitions. [2023-11-26 10:48:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1543 transitions. [2023-11-26 10:48:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:48:21,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:21,615 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:21,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:21,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:21,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:21,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2075844274, now seen corresponding path program 1 times [2023-11-26 10:48:21,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:21,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397542073] [2023-11-26 10:48:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:21,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:21,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:21,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240311604] [2023-11-26 10:48:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:21,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:21,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:21,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:21,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:48:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:22,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:48:22,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:48:25,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397542073] [2023-11-26 10:48:25,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240311604] [2023-11-26 10:48:25,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240311604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:25,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:25,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:25,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202435643] [2023-11-26 10:48:25,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:25,700 INFO L87 Difference]: Start difference. First operand 920 states and 1543 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:30,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-26 10:48:34,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-26 10:48:38,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-26 10:48:42,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-26 10:48:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:43,581 INFO L93 Difference]: Finished difference Result 3395 states and 5719 transitions. [2023-11-26 10:48:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 497 [2023-11-26 10:48:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:43,600 INFO L225 Difference]: With dead ends: 3395 [2023-11-26 10:48:43,601 INFO L226 Difference]: Without dead ends: 2476 [2023-11-26 10:48:43,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:48:43,606 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 958 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 149 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:43,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 2522 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 527 Invalid, 3 Unknown, 0 Unchecked, 17.5s Time] [2023-11-26 10:48:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2023-11-26 10:48:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1835. [2023-11-26 10:48:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1498 states have (on average 1.6168224299065421) internal successors, (2422), 1502 states have internal predecessors, (2422), 328 states have call successors, (328), 8 states have call predecessors, (328), 8 states have return successors, (328), 324 states have call predecessors, (328), 328 states have call successors, (328) [2023-11-26 10:48:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 3078 transitions. [2023-11-26 10:48:43,884 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 3078 transitions. Word has length 497 [2023-11-26 10:48:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:43,886 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 3078 transitions. [2023-11-26 10:48:43,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:48:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 3078 transitions. [2023-11-26 10:48:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 10:48:43,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:43,894 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:43,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:44,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:44,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:44,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1236810612, now seen corresponding path program 1 times [2023-11-26 10:48:44,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:44,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654243455] [2023-11-26 10:48:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:44,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:44,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376041117] [2023-11-26 10:48:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:44,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:44,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:44,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:44,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:48:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:44,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:48:44,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 4353 proven. 159 refuted. 0 times theorem prover too weak. 6292 trivial. 0 not checked. [2023-11-26 10:48:45,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 60 proven. 159 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:48:46,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:46,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654243455] [2023-11-26 10:48:46,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:46,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376041117] [2023-11-26 10:48:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376041117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:46,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:46,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 10:48:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708432631] [2023-11-26 10:48:46,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:46,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:48:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:48:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:48:46,533 INFO L87 Difference]: Start difference. First operand 1835 states and 3078 transitions. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-11-26 10:48:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:47,859 INFO L93 Difference]: Finished difference Result 3756 states and 6254 transitions. [2023-11-26 10:48:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:48:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) Word has length 497 [2023-11-26 10:48:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:47,878 INFO L225 Difference]: With dead ends: 3756 [2023-11-26 10:48:47,878 INFO L226 Difference]: Without dead ends: 1922 [2023-11-26 10:48:47,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 984 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:48:47,885 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 773 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:47,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 1207 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:48:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2023-11-26 10:48:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1897. [2023-11-26 10:48:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1532 states have (on average 1.6005221932114881) internal successors, (2452), 1537 states have internal predecessors, (2452), 348 states have call successors, (348), 16 states have call predecessors, (348), 16 states have return successors, (348), 343 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-26 10:48:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3148 transitions. [2023-11-26 10:48:48,217 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3148 transitions. Word has length 497 [2023-11-26 10:48:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:48,219 INFO L495 AbstractCegarLoop]: Abstraction has 1897 states and 3148 transitions. [2023-11-26 10:48:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-11-26 10:48:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3148 transitions. [2023-11-26 10:48:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-26 10:48:48,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:48,233 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:48,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:48,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:48,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1157587020, now seen corresponding path program 1 times [2023-11-26 10:48:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178577616] [2023-11-26 10:48:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:48,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:48,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872177083] [2023-11-26 10:48:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:48,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:48,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:49,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:49,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 2395 proven. 192 refuted. 0 times theorem prover too weak. 8217 trivial. 0 not checked. [2023-11-26 10:48:49,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 27 proven. 192 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:48:50,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:50,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178577616] [2023-11-26 10:48:50,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:50,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872177083] [2023-11-26 10:48:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872177083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:50,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:50,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:48:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957419950] [2023-11-26 10:48:50,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:50,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:50,675 INFO L87 Difference]: Start difference. First operand 1897 states and 3148 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) [2023-11-26 10:48:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:51,719 INFO L93 Difference]: Finished difference Result 3157 states and 5198 transitions. [2023-11-26 10:48:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) Word has length 498 [2023-11-26 10:48:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:51,733 INFO L225 Difference]: With dead ends: 3157 [2023-11-26 10:48:51,734 INFO L226 Difference]: Without dead ends: 1291 [2023-11-26 10:48:51,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 988 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:48:51,741 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 911 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:51,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1069 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:48:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2023-11-26 10:48:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1265. [2023-11-26 10:48:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 931 states have (on average 1.5349087003222341) internal successors, (1429), 932 states have internal predecessors, (1429), 316 states have call successors, (316), 17 states have call predecessors, (316), 17 states have return successors, (316), 315 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-26 10:48:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2061 transitions. [2023-11-26 10:48:51,945 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2061 transitions. Word has length 498 [2023-11-26 10:48:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:51,946 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 2061 transitions. [2023-11-26 10:48:51,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) [2023-11-26 10:48:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2061 transitions. [2023-11-26 10:48:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-26 10:48:51,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:51,954 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:51,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:52,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:52,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash -655002920, now seen corresponding path program 1 times [2023-11-26 10:48:52,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:52,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740394178] [2023-11-26 10:48:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:52,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54100814] [2023-11-26 10:48:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:52,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:52,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:52,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:48:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:52,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:52,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5235 proven. 132 refuted. 0 times theorem prover too weak. 5437 trivial. 0 not checked. [2023-11-26 10:48:53,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 87 proven. 132 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:48:54,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:54,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740394178] [2023-11-26 10:48:54,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:54,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54100814] [2023-11-26 10:48:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54100814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:54,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 10:48:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20347369] [2023-11-26 10:48:54,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:54,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:48:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:48:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:48:54,120 INFO L87 Difference]: Start difference. First operand 1265 states and 2061 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-26 10:48:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:55,845 INFO L93 Difference]: Finished difference Result 2535 states and 4104 transitions. [2023-11-26 10:48:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:48:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) Word has length 500 [2023-11-26 10:48:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:55,863 INFO L225 Difference]: With dead ends: 2535 [2023-11-26 10:48:55,863 INFO L226 Difference]: Without dead ends: 1305 [2023-11-26 10:48:55,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 992 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:48:55,869 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 643 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:55,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 1085 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-26 10:48:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2023-11-26 10:48:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1033. [2023-11-26 10:48:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 774 states have (on average 1.545219638242894) internal successors, (1196), 776 states have internal predecessors, (1196), 242 states have call successors, (242), 16 states have call predecessors, (242), 16 states have return successors, (242), 240 states have call predecessors, (242), 242 states have call successors, (242) [2023-11-26 10:48:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1680 transitions. [2023-11-26 10:48:56,040 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1680 transitions. Word has length 500 [2023-11-26 10:48:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:56,041 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 1680 transitions. [2023-11-26 10:48:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-26 10:48:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1680 transitions. [2023-11-26 10:48:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-26 10:48:56,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:56,049 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:56,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:56,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:56,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:56,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2078993632, now seen corresponding path program 1 times [2023-11-26 10:48:56,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734603043] [2023-11-26 10:48:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:56,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:56,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459484976] [2023-11-26 10:48:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:56,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:56,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:56,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:48:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:56,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:56,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 4545 proven. 63 refuted. 0 times theorem prover too weak. 6196 trivial. 0 not checked. [2023-11-26 10:48:57,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 156 proven. 63 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:48:57,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:57,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734603043] [2023-11-26 10:48:57,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:57,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459484976] [2023-11-26 10:48:57,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459484976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:57,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:57,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:48:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953402381] [2023-11-26 10:48:57,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:57,889 INFO L87 Difference]: Start difference. First operand 1033 states and 1680 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-11-26 10:48:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:58,955 INFO L93 Difference]: Finished difference Result 2069 states and 3341 transitions. [2023-11-26 10:48:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:58,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) Word has length 500 [2023-11-26 10:48:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:58,965 INFO L225 Difference]: With dead ends: 2069 [2023-11-26 10:48:58,965 INFO L226 Difference]: Without dead ends: 1071 [2023-11-26 10:48:58,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 992 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:48:58,971 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 915 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:58,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 1089 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:48:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2023-11-26 10:48:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1045. [2023-11-26 10:48:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 783 states have (on average 1.5338441890166028) internal successors, (1201), 785 states have internal predecessors, (1201), 242 states have call successors, (242), 19 states have call predecessors, (242), 19 states have return successors, (242), 240 states have call predecessors, (242), 242 states have call successors, (242) [2023-11-26 10:48:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1685 transitions. [2023-11-26 10:48:59,128 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1685 transitions. Word has length 500 [2023-11-26 10:48:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:59,130 INFO L495 AbstractCegarLoop]: Abstraction has 1045 states and 1685 transitions. [2023-11-26 10:48:59,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-11-26 10:48:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1685 transitions. [2023-11-26 10:48:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-26 10:48:59,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:59,137 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:59,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:59,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1967827170, now seen corresponding path program 1 times [2023-11-26 10:48:59,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:59,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142776561] [2023-11-26 10:48:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:59,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:59,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:59,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472512528] [2023-11-26 10:48:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:59,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:59,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:59,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da951c6c-7b17-45d2-be03-454bfa6ac0da/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process