./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/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_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/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_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/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 472f160323a45b927913d546ba36407c4908d2f65580a236f66341d4d39cf8a5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:01,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:01,199 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:52:01,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:01,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:01,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:01,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:01,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:01,252 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:01,257 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:01,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:01,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:01,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:01,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:01,263 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:01,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:01,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:52:01,264 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:01,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:01,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:01,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:01,266 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:52:01,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:01,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:52:01,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:01,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:52:01,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:01,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:01,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:01,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:01,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:01,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:01,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:01,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:01,274 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:52:01,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:01,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:01,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:01,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:01,276 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:52:01,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:01,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:01,277 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_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 472f160323a45b927913d546ba36407c4908d2f65580a236f66341d4d39cf8a5 [2023-11-26 11:52:01,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:01,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:01,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:01,678 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:01,679 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:01,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i [2023-11-26 11:52:04,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:05,155 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:05,155 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i [2023-11-26 11:52:05,183 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/data/1e9db3dbe/2040710e6c3a453e99cd73fa4be7c125/FLAGb6e885ab5 [2023-11-26 11:52:05,201 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/data/1e9db3dbe/2040710e6c3a453e99cd73fa4be7c125 [2023-11-26 11:52:05,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:05,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:05,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:05,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:05,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:05,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547c7223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05, skipping insertion in model container [2023-11-26 11:52:05,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,277 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:05,474 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_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i[919,932] [2023-11-26 11:52:05,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:05,591 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:05,607 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_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i[919,932] [2023-11-26 11:52:05,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:05,673 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:05,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05 WrapperNode [2023-11-26 11:52:05,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:05,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:05,675 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:05,675 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:05,683 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,771 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 253 [2023-11-26 11:52:05,771 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:05,772 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:05,772 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:05,772 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:05,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,816 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 11:52:05,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,839 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,844 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:05,845 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:05,845 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:05,845 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:05,846 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (1/1) ... [2023-11-26 11:52:05,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:05,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:05,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:52:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:52:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:06,081 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:06,083 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:06,685 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:06,763 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:06,763 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:52:06,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:06 BoogieIcfgContainer [2023-11-26 11:52:06,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:06,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:06,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:06,772 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:06,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:05" (1/3) ... [2023-11-26 11:52:06,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422b93a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:06, skipping insertion in model container [2023-11-26 11:52:06,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:05" (2/3) ... [2023-11-26 11:52:06,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422b93a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:06, skipping insertion in model container [2023-11-26 11:52:06,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:06" (3/3) ... [2023-11-26 11:52:06,775 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-ps-cn_file-66.i [2023-11-26 11:52:06,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:06,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:06,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:06,860 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;@541748e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:06,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 63 states have internal predecessors, (90), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-26 11:52:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-26 11:52:06,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:06,913 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:06,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:06,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1360282986, now seen corresponding path program 1 times [2023-11-26 11:52:06,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:06,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580766434] [2023-11-26 11:52:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:06,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580766434] [2023-11-26 11:52:07,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:52:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977143790] [2023-11-26 11:52:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:07,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:07,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:07,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:52:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:07,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:52:07,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2023-11-26 11:52:07,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:07,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977143790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:07,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:07,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:07,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572411820] [2023-11-26 11:52:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:07,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:52:07,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:52:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:07,868 INFO L87 Difference]: Start difference. First operand has 109 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 63 states have internal predecessors, (90), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-26 11:52:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:07,924 INFO L93 Difference]: Finished difference Result 215 states and 398 transitions. [2023-11-26 11:52:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:52:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) Word has length 267 [2023-11-26 11:52:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:07,936 INFO L225 Difference]: With dead ends: 215 [2023-11-26 11:52:07,937 INFO L226 Difference]: Without dead ends: 107 [2023-11-26 11:52:07,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 266 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 11:52:07,946 INFO L413 NwaCegarLoop]: 170 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, 170 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 11:52:07,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-26 11:52:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-26 11:52:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 61 states have internal predecessors, (85), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-26 11:52:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 173 transitions. [2023-11-26 11:52:08,028 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 173 transitions. Word has length 267 [2023-11-26 11:52:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:08,028 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 173 transitions. [2023-11-26 11:52:08,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-26 11:52:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 173 transitions. [2023-11-26 11:52:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-26 11:52:08,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:08,036 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:08,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:08,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:52:08,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:08,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash -349916634, now seen corresponding path program 1 times [2023-11-26 11:52:08,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:08,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079856024] [2023-11-26 11:52:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:08,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:08,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:08,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139759566] [2023-11-26 11:52:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:08,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:08,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:08,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:08,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:52:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:08,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:52:08,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-26 11:52:08,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:08,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079856024] [2023-11-26 11:52:08,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139759566] [2023-11-26 11:52:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139759566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:08,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:08,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200807759] [2023-11-26 11:52:08,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:08,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:08,638 INFO L87 Difference]: Start difference. First operand 107 states and 173 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-26 11:52:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:08,773 INFO L93 Difference]: Finished difference Result 318 states and 515 transitions. [2023-11-26 11:52:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:08,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 267 [2023-11-26 11:52:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:08,780 INFO L225 Difference]: With dead ends: 318 [2023-11-26 11:52:08,781 INFO L226 Difference]: Without dead ends: 212 [2023-11-26 11:52:08,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 265 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 11:52:08,784 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 162 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:08,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 470 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-26 11:52:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2023-11-26 11:52:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 119 states have (on average 1.3529411764705883) internal successors, (161), 119 states have internal predecessors, (161), 88 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-26 11:52:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 337 transitions. [2023-11-26 11:52:08,852 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 337 transitions. Word has length 267 [2023-11-26 11:52:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:08,855 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 337 transitions. [2023-11-26 11:52:08,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-26 11:52:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 337 transitions. [2023-11-26 11:52:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-26 11:52:08,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:08,862 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:08,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:09,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:09,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:09,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1425090728, now seen corresponding path program 1 times [2023-11-26 11:52:09,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:09,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795305157] [2023-11-26 11:52:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:09,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024320726] [2023-11-26 11:52:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:09,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:09,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:09,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:09,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:52:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:09,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:52:09,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-26 11:52:10,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:10,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:10,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795305157] [2023-11-26 11:52:10,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024320726] [2023-11-26 11:52:10,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024320726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:10,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:10,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:52:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167070985] [2023-11-26 11:52:10,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:10,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:10,520 INFO L87 Difference]: Start difference. First operand 210 states and 337 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-26 11:52:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:10,963 INFO L93 Difference]: Finished difference Result 642 states and 1019 transitions. [2023-11-26 11:52:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 267 [2023-11-26 11:52:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:10,970 INFO L225 Difference]: With dead ends: 642 [2023-11-26 11:52:10,970 INFO L226 Difference]: Without dead ends: 433 [2023-11-26 11:52:10,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:52:10,973 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 58 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:10,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 469 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:52:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-26 11:52:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 428. [2023-11-26 11:52:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 241 states have (on average 1.3236514522821576) internal successors, (319), 242 states have internal predecessors, (319), 180 states have call successors, (180), 6 states have call predecessors, (180), 6 states have return successors, (180), 179 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-26 11:52:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 679 transitions. [2023-11-26 11:52:11,078 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 679 transitions. Word has length 267 [2023-11-26 11:52:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:11,079 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 679 transitions. [2023-11-26 11:52:11,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-26 11:52:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 679 transitions. [2023-11-26 11:52:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-26 11:52:11,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:11,085 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:11,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:11,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:11,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash 615744102, now seen corresponding path program 1 times [2023-11-26 11:52:11,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:11,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183450431] [2023-11-26 11:52:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:11,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602135261] [2023-11-26 11:52:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:11,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:11,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:11,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:52:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:11,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:11,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 675 proven. 117 refuted. 0 times theorem prover too weak. 2992 trivial. 0 not checked. [2023-11-26 11:52:12,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 12 proven. 117 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-26 11:52:13,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183450431] [2023-11-26 11:52:13,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602135261] [2023-11-26 11:52:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602135261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:13,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:13,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 11:52:13,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438528346] [2023-11-26 11:52:13,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:13,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:13,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:13,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:13,043 INFO L87 Difference]: Start difference. First operand 428 states and 679 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 4 states have call successors, (88), 3 states have call predecessors, (88), 5 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) [2023-11-26 11:52:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:13,914 INFO L93 Difference]: Finished difference Result 944 states and 1468 transitions. [2023-11-26 11:52:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:52:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 4 states have call successors, (88), 3 states have call predecessors, (88), 5 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) Word has length 267 [2023-11-26 11:52:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:13,923 INFO L225 Difference]: With dead ends: 944 [2023-11-26 11:52:13,923 INFO L226 Difference]: Without dead ends: 611 [2023-11-26 11:52:13,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:52:13,927 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 251 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:13,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 490 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2023-11-26 11:52:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 580. [2023-11-26 11:52:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 335 states have (on average 1.31044776119403) internal successors, (439), 338 states have internal predecessors, (439), 232 states have call successors, (232), 12 states have call predecessors, (232), 12 states have return successors, (232), 229 states have call predecessors, (232), 232 states have call successors, (232) [2023-11-26 11:52:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 903 transitions. [2023-11-26 11:52:14,087 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 903 transitions. Word has length 267 [2023-11-26 11:52:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:14,088 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 903 transitions. [2023-11-26 11:52:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 4 states have call successors, (88), 3 states have call predecessors, (88), 5 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) [2023-11-26 11:52:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 903 transitions. [2023-11-26 11:52:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-26 11:52:14,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:14,094 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:14,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:14,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:14,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:14,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1050981212, now seen corresponding path program 1 times [2023-11-26 11:52:14,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:14,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041722108] [2023-11-26 11:52:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:14,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:14,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:14,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126354007] [2023-11-26 11:52:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:14,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:14,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613f9af2-deed-4469-b39f-6eb9cdf2ff8c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:52:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:14,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 11:52:14,634 INFO L285 TraceCheckSpWp]: Computing forward predicates...