./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-22.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_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/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_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-22.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/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_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/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 a2f8cfcbb935c56cacc0dcdd0cb17c9fa32a1e539a6b0588fb3d51d3444efdea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:20,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:20,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:20,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:20,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:20,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:20,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:20,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:20,905 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:20,906 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:20,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:20,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:20,909 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:20,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:20,910 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:20,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:20,912 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:20,912 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:20,913 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:20,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:20,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:20,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:20,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:20,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:20,917 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:20,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:20,918 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:20,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:20,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:20,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:20,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:20,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:20,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:20,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:20,922 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:20,923 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:20,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:20,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:20,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:20,924 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:20,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:20,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:20,925 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_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2f8cfcbb935c56cacc0dcdd0cb17c9fa32a1e539a6b0588fb3d51d3444efdea [2023-11-26 10:44:21,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:21,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:21,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:21,340 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:21,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:21,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-22.i [2023-11-26 10:44:24,669 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:24,999 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:25,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-22.i [2023-11-26 10:44:25,024 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/data/a9d02fb78/467ecd678b614b5ab1465059ea527fb7/FLAGc0309a81d [2023-11-26 10:44:25,039 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/data/a9d02fb78/467ecd678b614b5ab1465059ea527fb7 [2023-11-26 10:44:25,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:25,044 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:25,046 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:25,046 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:25,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:25,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:25,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b6cde7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25, skipping insertion in model container [2023-11-26 10:44:25,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:25,126 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:25,293 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_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-22.i[916,929] [2023-11-26 10:44:25,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:25,600 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:25,614 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_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-22.i[916,929] [2023-11-26 10:44:25,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:25,817 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:25,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25 WrapperNode [2023-11-26 10:44:25,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:25,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:25,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:25,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:25,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:25,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:25,971 INFO L138 Inliner]: procedures = 26, calls = 67, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 704 [2023-11-26 10:44:25,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:25,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:25,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:25,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:25,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:25,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,014 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,074 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 10:44:26,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:26,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:26,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:26,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:26,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (1/1) ... [2023-11-26 10:44:26,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:26,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:26,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:26,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:44:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:44:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:26,414 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:26,416 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:28,475 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:28,581 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:28,582 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:44:28,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:28 BoogieIcfgContainer [2023-11-26 10:44:28,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:28,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:28,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:28,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:28,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:25" (1/3) ... [2023-11-26 10:44:28,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be3b3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:28, skipping insertion in model container [2023-11-26 10:44:28,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:25" (2/3) ... [2023-11-26 10:44:28,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be3b3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:28, skipping insertion in model container [2023-11-26 10:44:28,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:28" (3/3) ... [2023-11-26 10:44:28,597 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-22.i [2023-11-26 10:44:28,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:28,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:28,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:28,716 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;@2eacb16c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:28,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:44:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 265 states, 208 states have (on average 1.6105769230769231) internal successors, (335), 209 states have internal predecessors, (335), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 10:44:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 10:44:28,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:28,759 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:28,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:28,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1817160949, now seen corresponding path program 1 times [2023-11-26 10:44:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:28,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304188806] [2023-11-26 10:44:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:28,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:29,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304188806] [2023-11-26 10:44:29,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:44:29,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125714715] [2023-11-26 10:44:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:29,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:29,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:29,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:29,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:44:29,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2023-11-26 10:44:29,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125714715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:29,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:29,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802157308] [2023-11-26 10:44:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:44:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:44:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:44:30,063 INFO L87 Difference]: Start difference. First operand has 265 states, 208 states have (on average 1.6105769230769231) internal successors, (335), 209 states have internal predecessors, (335), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) 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, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-26 10:44:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:30,173 INFO L93 Difference]: Finished difference Result 527 states and 938 transitions. [2023-11-26 10:44:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:44:30,183 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, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) Word has length 397 [2023-11-26 10:44:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:30,215 INFO L225 Difference]: With dead ends: 527 [2023-11-26 10:44:30,215 INFO L226 Difference]: Without dead ends: 263 [2023-11-26 10:44:30,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 396 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 10:44:30,232 INFO L413 NwaCegarLoop]: 435 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, 435 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 10:44:30,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 435 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-26 10:44:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2023-11-26 10:44:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.5942028985507246) internal successors, (330), 207 states have internal predecessors, (330), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 10:44:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 438 transitions. [2023-11-26 10:44:30,325 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 438 transitions. Word has length 397 [2023-11-26 10:44:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:30,326 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 438 transitions. [2023-11-26 10:44:30,327 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, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-26 10:44:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 438 transitions. [2023-11-26 10:44:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 10:44:30,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:30,340 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:30,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:30,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:44:30,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:30,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -554289769, now seen corresponding path program 1 times [2023-11-26 10:44:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777262908] [2023-11-26 10:44:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:30,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:30,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675772865] [2023-11-26 10:44:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:30,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:30,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:31,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:31,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:31,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:31,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777262908] [2023-11-26 10:44:31,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675772865] [2023-11-26 10:44:31,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675772865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:31,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:31,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:31,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946793203] [2023-11-26 10:44:31,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:31,389 INFO L87 Difference]: Start difference. First operand 263 states and 438 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:31,572 INFO L93 Difference]: Finished difference Result 722 states and 1204 transitions. [2023-11-26 10:44:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:31,574 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 397 [2023-11-26 10:44:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:31,587 INFO L225 Difference]: With dead ends: 722 [2023-11-26 10:44:31,587 INFO L226 Difference]: Without dead ends: 460 [2023-11-26 10:44:31,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 395 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 10:44:31,598 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 313 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:31,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 846 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:44:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-11-26 10:44:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 457. [2023-11-26 10:44:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 380 states have (on average 1.6131578947368421) internal successors, (613), 381 states have internal predecessors, (613), 74 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-26 10:44:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 761 transitions. [2023-11-26 10:44:31,687 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 761 transitions. Word has length 397 [2023-11-26 10:44:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:31,692 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 761 transitions. [2023-11-26 10:44:31,693 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 761 transitions. [2023-11-26 10:44:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 10:44:31,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:31,705 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:31,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 10:44:31,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:31,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:31,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash 198919571, now seen corresponding path program 1 times [2023-11-26 10:44:31,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:31,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97455865] [2023-11-26 10:44:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:31,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:32,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147304614] [2023-11-26 10:44:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:32,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:32,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:32,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:44:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:32,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:32,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:32,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97455865] [2023-11-26 10:44:32,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:32,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147304614] [2023-11-26 10:44:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147304614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:32,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:32,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53220898] [2023-11-26 10:44:32,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:32,582 INFO L87 Difference]: Start difference. First operand 457 states and 761 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:32,721 INFO L93 Difference]: Finished difference Result 1290 states and 2151 transitions. [2023-11-26 10:44:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:32,723 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 397 [2023-11-26 10:44:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:32,736 INFO L225 Difference]: With dead ends: 1290 [2023-11-26 10:44:32,736 INFO L226 Difference]: Without dead ends: 834 [2023-11-26 10:44:32,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 395 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 10:44:32,741 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 324 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:32,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1054 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:44:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-26 10:44:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 831. [2023-11-26 10:44:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 697 states have (on average 1.6169296987087518) internal successors, (1127), 700 states have internal predecessors, (1127), 129 states have call successors, (129), 4 states have call predecessors, (129), 4 states have return successors, (129), 126 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-26 10:44:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1385 transitions. [2023-11-26 10:44:32,836 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1385 transitions. Word has length 397 [2023-11-26 10:44:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:32,841 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1385 transitions. [2023-11-26 10:44:32,842 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1385 transitions. [2023-11-26 10:44:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 10:44:32,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:32,848 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:32,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:33,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:33,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:33,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash -800804525, now seen corresponding path program 1 times [2023-11-26 10:44:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:33,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334889845] [2023-11-26 10:44:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:33,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:33,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660620457] [2023-11-26 10:44:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:33,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:33,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:33,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:44:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:33,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:33,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:33,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:33,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:33,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334889845] [2023-11-26 10:44:33,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660620457] [2023-11-26 10:44:33,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660620457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:33,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:33,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257624022] [2023-11-26 10:44:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:33,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:33,738 INFO L87 Difference]: Start difference. First operand 831 states and 1385 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:33,903 INFO L93 Difference]: Finished difference Result 2283 states and 3795 transitions. [2023-11-26 10:44:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:33,904 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 397 [2023-11-26 10:44:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:33,922 INFO L225 Difference]: With dead ends: 2283 [2023-11-26 10:44:33,923 INFO L226 Difference]: Without dead ends: 1453 [2023-11-26 10:44:33,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 395 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 10:44:33,931 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 291 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:33,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 989 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:44:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2023-11-26 10:44:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1450. [2023-11-26 10:44:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1187 states have (on average 1.594776748104465) internal successors, (1893), 1194 states have internal predecessors, (1893), 254 states have call successors, (254), 8 states have call predecessors, (254), 8 states have return successors, (254), 247 states have call predecessors, (254), 254 states have call successors, (254) [2023-11-26 10:44:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2401 transitions. [2023-11-26 10:44:34,057 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2401 transitions. Word has length 397 [2023-11-26 10:44:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:34,058 INFO L495 AbstractCegarLoop]: Abstraction has 1450 states and 2401 transitions. [2023-11-26 10:44:34,059 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, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2401 transitions. [2023-11-26 10:44:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 10:44:34,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:34,067 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:34,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:34,277 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:34,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash -291331435, now seen corresponding path program 1 times [2023-11-26 10:44:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:34,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126980105] [2023-11-26 10:44:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:34,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:34,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:34,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830062209] [2023-11-26 10:44:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:34,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:34,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:34,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:34,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:44:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:34,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:44:34,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:36,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:36,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126980105] [2023-11-26 10:44:36,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830062209] [2023-11-26 10:44:36,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830062209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:36,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:36,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:36,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567839167] [2023-11-26 10:44:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:36,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:36,505 INFO L87 Difference]: Start difference. First operand 1450 states and 2401 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:36,757 INFO L93 Difference]: Finished difference Result 3717 states and 6136 transitions. [2023-11-26 10:44:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 397 [2023-11-26 10:44:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:36,776 INFO L225 Difference]: With dead ends: 3717 [2023-11-26 10:44:36,777 INFO L226 Difference]: Without dead ends: 2268 [2023-11-26 10:44:36,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 395 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 10:44:36,784 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 242 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:36,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 824 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:44:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2023-11-26 10:44:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2265. [2023-11-26 10:44:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1820 states have (on average 1.5697802197802198) internal successors, (2857), 1830 states have internal predecessors, (2857), 428 states have call successors, (428), 16 states have call predecessors, (428), 16 states have return successors, (428), 418 states have call predecessors, (428), 428 states have call successors, (428) [2023-11-26 10:44:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3713 transitions. [2023-11-26 10:44:36,990 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3713 transitions. Word has length 397 [2023-11-26 10:44:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:36,991 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3713 transitions. [2023-11-26 10:44:36,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3713 transitions. [2023-11-26 10:44:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 10:44:36,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:36,999 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:37,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:37,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:37,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:37,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -250656685, now seen corresponding path program 1 times [2023-11-26 10:44:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:37,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952166906] [2023-11-26 10:44:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:37,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:37,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160306712] [2023-11-26 10:44:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:37,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:37,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:37,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:44:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:37,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:44:37,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:38,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:38,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:38,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952166906] [2023-11-26 10:44:38,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160306712] [2023-11-26 10:44:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160306712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:38,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:38,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:38,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320348865] [2023-11-26 10:44:38,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:38,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:38,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:38,229 INFO L87 Difference]: Start difference. First operand 2265 states and 3713 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:38,653 INFO L93 Difference]: Finished difference Result 6134 states and 10103 transitions. [2023-11-26 10:44:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 397 [2023-11-26 10:44:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:38,680 INFO L225 Difference]: With dead ends: 6134 [2023-11-26 10:44:38,680 INFO L226 Difference]: Without dead ends: 3870 [2023-11-26 10:44:38,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:38,689 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 528 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:38,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1274 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:44:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2023-11-26 10:44:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3352. [2023-11-26 10:44:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 2850 states have (on average 1.6214035087719298) internal successors, (4621), 2860 states have internal predecessors, (4621), 482 states have call successors, (482), 19 states have call predecessors, (482), 19 states have return successors, (482), 472 states have call predecessors, (482), 482 states have call successors, (482) [2023-11-26 10:44:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5585 transitions. [2023-11-26 10:44:38,985 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5585 transitions. Word has length 397 [2023-11-26 10:44:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:38,987 INFO L495 AbstractCegarLoop]: Abstraction has 3352 states and 5585 transitions. [2023-11-26 10:44:38,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5585 transitions. [2023-11-26 10:44:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-26 10:44:38,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:38,997 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:39,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:39,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:39,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash -469588094, now seen corresponding path program 1 times [2023-11-26 10:44:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769279915] [2023-11-26 10:44:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:39,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:39,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:39,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527194594] [2023-11-26 10:44:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:39,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:39,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:39,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:44:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:39,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:44:39,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:40,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:40,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769279915] [2023-11-26 10:44:40,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527194594] [2023-11-26 10:44:40,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527194594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:40,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:40,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:44:40,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082403866] [2023-11-26 10:44:40,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:44:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:44:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:44:40,265 INFO L87 Difference]: Start difference. First operand 3352 states and 5585 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:40,890 INFO L93 Difference]: Finished difference Result 7117 states and 11804 transitions. [2023-11-26 10:44:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 399 [2023-11-26 10:44:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:40,920 INFO L225 Difference]: With dead ends: 7117 [2023-11-26 10:44:40,921 INFO L226 Difference]: Without dead ends: 3871 [2023-11-26 10:44:40,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:40,931 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 529 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:40,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 2008 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:44:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2023-11-26 10:44:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3353. [2023-11-26 10:44:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 2851 states have (on average 1.6211855489301998) internal successors, (4622), 2861 states have internal predecessors, (4622), 482 states have call successors, (482), 19 states have call predecessors, (482), 19 states have return successors, (482), 472 states have call predecessors, (482), 482 states have call successors, (482) [2023-11-26 10:44:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 5586 transitions. [2023-11-26 10:44:41,177 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 5586 transitions. Word has length 399 [2023-11-26 10:44:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:41,178 INFO L495 AbstractCegarLoop]: Abstraction has 3353 states and 5586 transitions. [2023-11-26 10:44:41,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 5586 transitions. [2023-11-26 10:44:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-26 10:44:41,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:41,185 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:41,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:41,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:41,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:41,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1407475136, now seen corresponding path program 1 times [2023-11-26 10:44:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:41,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789327180] [2023-11-26 10:44:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:41,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:41,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:41,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079765574] [2023-11-26 10:44:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:41,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:41,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:41,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:44:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:41,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:41,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2733 proven. 99 refuted. 0 times theorem prover too weak. 2892 trivial. 0 not checked. [2023-11-26 10:44:42,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 60 proven. 99 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-26 10:44:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:42,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789327180] [2023-11-26 10:44:42,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079765574] [2023-11-26 10:44:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079765574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:42,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:42,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:44:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426228830] [2023-11-26 10:44:42,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:42,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:42,760 INFO L87 Difference]: Start difference. First operand 3353 states and 5586 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-26 10:44:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:43,443 INFO L93 Difference]: Finished difference Result 4193 states and 6953 transitions. [2023-11-26 10:44:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:44:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 399 [2023-11-26 10:44:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:43,454 INFO L225 Difference]: With dead ends: 4193 [2023-11-26 10:44:43,454 INFO L226 Difference]: Without dead ends: 1283 [2023-11-26 10:44:43,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 790 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:44:43,464 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 317 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:43,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1086 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:44:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2023-11-26 10:44:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1269. [2023-11-26 10:44:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1028 states have (on average 1.5963035019455254) internal successors, (1641), 1031 states have internal predecessors, (1641), 228 states have call successors, (228), 12 states have call predecessors, (228), 12 states have return successors, (228), 225 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-26 10:44:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 2097 transitions. [2023-11-26 10:44:43,573 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 2097 transitions. Word has length 399 [2023-11-26 10:44:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:43,574 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 2097 transitions. [2023-11-26 10:44:43,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-26 10:44:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 2097 transitions. [2023-11-26 10:44:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-11-26 10:44:43,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:43,580 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:43,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 10:44:43,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:44:43,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:43,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 745294027, now seen corresponding path program 1 times [2023-11-26 10:44:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:43,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208117828] [2023-11-26 10:44:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:43,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:43,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211174715] [2023-11-26 10:44:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:43,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:43,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:43,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:43,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:44:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:44,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:44,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2643 proven. 54 refuted. 0 times theorem prover too weak. 3027 trivial. 0 not checked. [2023-11-26 10:44:44,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 105 proven. 54 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-26 10:44:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208117828] [2023-11-26 10:44:44,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211174715] [2023-11-26 10:44:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211174715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:44,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:44:44,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:44:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999093967] [2023-11-26 10:44:44,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:44,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:44,958 INFO L87 Difference]: Start difference. First operand 1269 states and 2097 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, (72), 2 states have call predecessors, (72), 4 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-26 10:44:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:45,426 INFO L93 Difference]: Finished difference Result 1901 states and 3123 transitions. [2023-11-26 10:44:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:44:45,426 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, (72), 2 states have call predecessors, (72), 4 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 400 [2023-11-26 10:44:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:45,433 INFO L225 Difference]: With dead ends: 1901 [2023-11-26 10:44:45,433 INFO L226 Difference]: Without dead ends: 781 [2023-11-26 10:44:45,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 792 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 10:44:45,437 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 604 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:45,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 981 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:44:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2023-11-26 10:44:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 767. [2023-11-26 10:44:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 595 states have (on average 1.542857142857143) internal successors, (918), 596 states have internal predecessors, (918), 158 states have call successors, (158), 13 states have call predecessors, (158), 13 states have return successors, (158), 157 states have call predecessors, (158), 158 states have call successors, (158) [2023-11-26 10:44:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1234 transitions. [2023-11-26 10:44:45,533 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1234 transitions. Word has length 400 [2023-11-26 10:44:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:45,534 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1234 transitions. [2023-11-26 10:44:45,535 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, (72), 2 states have call predecessors, (72), 4 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-26 10:44:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1234 transitions. [2023-11-26 10:44:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:44:45,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:45,540 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:45,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:45,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:45,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:45,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:45,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1063108283, now seen corresponding path program 1 times [2023-11-26 10:44:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109122692] [2023-11-26 10:44:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:45,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255076195] [2023-11-26 10:44:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:45,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:45,828 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:44:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:46,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 10:44:46,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:47,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109122692] [2023-11-26 10:44:47,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255076195] [2023-11-26 10:44:47,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255076195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:47,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:47,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:44:47,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142109427] [2023-11-26 10:44:47,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:47,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:44:47,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:44:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:47,020 INFO L87 Difference]: Start difference. First operand 767 states and 1234 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:49,556 INFO L93 Difference]: Finished difference Result 2132 states and 3450 transitions. [2023-11-26 10:44:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:44:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 401 [2023-11-26 10:44:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:49,569 INFO L225 Difference]: With dead ends: 2132 [2023-11-26 10:44:49,569 INFO L226 Difference]: Without dead ends: 1454 [2023-11-26 10:44:49,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:44:49,572 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 1727 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:49,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 2122 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-26 10:44:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2023-11-26 10:44:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1328. [2023-11-26 10:44:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1094 states have (on average 1.553016453382084) internal successors, (1699), 1096 states have internal predecessors, (1699), 212 states have call successors, (212), 21 states have call predecessors, (212), 21 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-26 10:44:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 2123 transitions. [2023-11-26 10:44:49,679 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 2123 transitions. Word has length 401 [2023-11-26 10:44:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:49,680 INFO L495 AbstractCegarLoop]: Abstraction has 1328 states and 2123 transitions. [2023-11-26 10:44:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 2123 transitions. [2023-11-26 10:44:49,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:44:49,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:49,685 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:49,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:49,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:44:49,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:49,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash -952169281, now seen corresponding path program 1 times [2023-11-26 10:44:49,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:49,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115178127] [2023-11-26 10:44:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:49,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:49,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:49,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412206661] [2023-11-26 10:44:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:49,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:49,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:49,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:50,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:44:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:50,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:44:50,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2045 proven. 123 refuted. 0 times theorem prover too weak. 3556 trivial. 0 not checked. [2023-11-26 10:44:51,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115178127] [2023-11-26 10:44:51,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412206661] [2023-11-26 10:44:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412206661] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:44:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-11-26 10:44:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63834421] [2023-11-26 10:44:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:44:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:44:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:44:51,339 INFO L87 Difference]: Start difference. First operand 1328 states and 2123 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:52,632 INFO L93 Difference]: Finished difference Result 7733 states and 12732 transitions. [2023-11-26 10:44:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:44:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 401 [2023-11-26 10:44:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:52,675 INFO L225 Difference]: With dead ends: 7733 [2023-11-26 10:44:52,675 INFO L226 Difference]: Without dead ends: 6648 [2023-11-26 10:44:52,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 791 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:44:52,679 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 2157 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2157 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:52,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2157 Valid, 3055 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:44:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6648 states. [2023-11-26 10:44:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6648 to 4246. [2023-11-26 10:44:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 3762 states have (on average 1.5914407230196703) internal successors, (5987), 3772 states have internal predecessors, (5987), 442 states have call successors, (442), 41 states have call predecessors, (442), 41 states have return successors, (442), 432 states have call predecessors, (442), 442 states have call successors, (442) [2023-11-26 10:44:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 6871 transitions. [2023-11-26 10:44:52,984 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 6871 transitions. Word has length 401 [2023-11-26 10:44:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:52,986 INFO L495 AbstractCegarLoop]: Abstraction has 4246 states and 6871 transitions. [2023-11-26 10:44:52,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 6871 transitions. [2023-11-26 10:44:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:44:52,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:52,998 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:53,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:44:53,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:53,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash -967687999, now seen corresponding path program 1 times [2023-11-26 10:44:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:53,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083268367] [2023-11-26 10:44:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:53,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:53,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091861400] [2023-11-26 10:44:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:53,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:53,268 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:53,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:44:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:53,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:44:53,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:54,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:54,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:54,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083268367] [2023-11-26 10:44:54,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:54,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091861400] [2023-11-26 10:44:54,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091861400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:54,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:54,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:44:54,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131079535] [2023-11-26 10:44:54,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:54,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:44:54,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:44:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:44:54,240 INFO L87 Difference]: Start difference. First operand 4246 states and 6871 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:54,896 INFO L93 Difference]: Finished difference Result 14653 states and 23797 transitions. [2023-11-26 10:44:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 401 [2023-11-26 10:44:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:54,930 INFO L225 Difference]: With dead ends: 14653 [2023-11-26 10:44:54,930 INFO L226 Difference]: Without dead ends: 10529 [2023-11-26 10:44:54,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:54,941 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 598 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:54,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1513 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:44:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2023-11-26 10:44:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 9921. [2023-11-26 10:44:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9921 states, 9015 states have (on average 1.6051026067665002) internal successors, (14470), 9035 states have internal predecessors, (14470), 830 states have call successors, (830), 75 states have call predecessors, (830), 75 states have return successors, (830), 810 states have call predecessors, (830), 830 states have call successors, (830) [2023-11-26 10:44:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9921 states to 9921 states and 16130 transitions. [2023-11-26 10:44:55,551 INFO L78 Accepts]: Start accepts. Automaton has 9921 states and 16130 transitions. Word has length 401 [2023-11-26 10:44:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:55,552 INFO L495 AbstractCegarLoop]: Abstraction has 9921 states and 16130 transitions. [2023-11-26 10:44:55,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9921 states and 16130 transitions. [2023-11-26 10:44:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:44:55,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:55,565 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:55,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:55,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:44:55,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:55,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1461153347, now seen corresponding path program 1 times [2023-11-26 10:44:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:55,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758239654] [2023-11-26 10:44:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:55,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:55,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:55,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825400897] [2023-11-26 10:44:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:55,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:55,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:55,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:55,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:44:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:44:56,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:44:56,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758239654] [2023-11-26 10:44:56,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:44:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825400897] [2023-11-26 10:44:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825400897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:56,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:56,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:44:56,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426963283] [2023-11-26 10:44:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:56,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:44:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:44:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:44:56,986 INFO L87 Difference]: Start difference. First operand 9921 states and 16130 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:57,689 INFO L93 Difference]: Finished difference Result 13410 states and 21629 transitions. [2023-11-26 10:44:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:44:57,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 401 [2023-11-26 10:44:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:57,720 INFO L225 Difference]: With dead ends: 13410 [2023-11-26 10:44:57,720 INFO L226 Difference]: Without dead ends: 9273 [2023-11-26 10:44:57,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:57,732 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 713 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:57,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1772 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:44:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9273 states. [2023-11-26 10:44:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9273 to 8717. [2023-11-26 10:44:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8717 states, 7811 states have (on average 1.590833440020484) internal successors, (12426), 7831 states have internal predecessors, (12426), 830 states have call successors, (830), 75 states have call predecessors, (830), 75 states have return successors, (830), 810 states have call predecessors, (830), 830 states have call successors, (830) [2023-11-26 10:44:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 14086 transitions. [2023-11-26 10:44:58,309 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 14086 transitions. Word has length 401 [2023-11-26 10:44:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:58,309 INFO L495 AbstractCegarLoop]: Abstraction has 8717 states and 14086 transitions. [2023-11-26 10:44:58,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:44:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 14086 transitions. [2023-11-26 10:44:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:44:58,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:58,317 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:44:58,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:58,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:58,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:58,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1432653057, now seen corresponding path program 1 times [2023-11-26 10:44:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822337514] [2023-11-26 10:44:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:58,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:44:58,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356216495] [2023-11-26 10:44:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:58,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:58,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:58,590 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:58,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:44:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:59,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:44:59,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2916 proven. 168 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2023-11-26 10:45:00,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 144 proven. 171 refuted. 0 times theorem prover too weak. 5409 trivial. 0 not checked. [2023-11-26 10:45:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822337514] [2023-11-26 10:45:00,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356216495] [2023-11-26 10:45:00,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356216495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:00,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-26 10:45:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093546107] [2023-11-26 10:45:00,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:45:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:45:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:45:00,669 INFO L87 Difference]: Start difference. First operand 8717 states and 14086 transitions. Second operand has 14 states, 13 states have (on average 17.692307692307693) internal successors, (230), 12 states have internal predecessors, (230), 5 states have call successors, (83), 3 states have call predecessors, (83), 6 states have return successors, (84), 5 states have call predecessors, (84), 5 states have call successors, (84) [2023-11-26 10:45:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:01,578 INFO L93 Difference]: Finished difference Result 16894 states and 27174 transitions. [2023-11-26 10:45:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:45:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 17.692307692307693) internal successors, (230), 12 states have internal predecessors, (230), 5 states have call successors, (83), 3 states have call predecessors, (83), 6 states have return successors, (84), 5 states have call predecessors, (84), 5 states have call successors, (84) Word has length 401 [2023-11-26 10:45:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:01,609 INFO L225 Difference]: With dead ends: 16894 [2023-11-26 10:45:01,610 INFO L226 Difference]: Without dead ends: 8917 [2023-11-26 10:45:01,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:45:01,627 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 269 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:01,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1229 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:45:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8917 states. [2023-11-26 10:45:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8917 to 8821. [2023-11-26 10:45:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 7889 states have (on average 1.5730764355431615) internal successors, (12410), 7909 states have internal predecessors, (12410), 830 states have call successors, (830), 101 states have call predecessors, (830), 101 states have return successors, (830), 810 states have call predecessors, (830), 830 states have call successors, (830) [2023-11-26 10:45:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 14070 transitions. [2023-11-26 10:45:02,173 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 14070 transitions. Word has length 401 [2023-11-26 10:45:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:02,175 INFO L495 AbstractCegarLoop]: Abstraction has 8821 states and 14070 transitions. [2023-11-26 10:45:02,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 17.692307692307693) internal successors, (230), 12 states have internal predecessors, (230), 5 states have call successors, (83), 3 states have call predecessors, (83), 6 states have return successors, (84), 5 states have call predecessors, (84), 5 states have call successors, (84) [2023-11-26 10:45:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 14070 transitions. [2023-11-26 10:45:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:45:02,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:02,183 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:02,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:45:02,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:02,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash 588647555, now seen corresponding path program 1 times [2023-11-26 10:45:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946161218] [2023-11-26 10:45:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:02,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:02,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963383052] [2023-11-26 10:45:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:02,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:02,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:02,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:45:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:03,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:45:03,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-26 10:45:04,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:04,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946161218] [2023-11-26 10:45:04,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:45:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963383052] [2023-11-26 10:45:04,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963383052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:04,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:04,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:04,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524361387] [2023-11-26 10:45:04,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:04,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:45:04,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:04,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:45:04,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:04,758 INFO L87 Difference]: Start difference. First operand 8821 states and 14070 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:45:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:06,069 INFO L93 Difference]: Finished difference Result 18947 states and 29999 transitions. [2023-11-26 10:45:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:06,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 401 [2023-11-26 10:45:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:06,095 INFO L225 Difference]: With dead ends: 18947 [2023-11-26 10:45:06,095 INFO L226 Difference]: Without dead ends: 11260 [2023-11-26 10:45:06,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:06,112 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 914 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:06,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 1551 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:45:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11260 states. [2023-11-26 10:45:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11260 to 9294. [2023-11-26 10:45:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 8362 states have (on average 1.5798851949294428) internal successors, (13211), 8382 states have internal predecessors, (13211), 830 states have call successors, (830), 101 states have call predecessors, (830), 101 states have return successors, (830), 810 states have call predecessors, (830), 830 states have call successors, (830) [2023-11-26 10:45:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 14871 transitions. [2023-11-26 10:45:06,700 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 14871 transitions. Word has length 401 [2023-11-26 10:45:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:06,702 INFO L495 AbstractCegarLoop]: Abstraction has 9294 states and 14871 transitions. [2023-11-26 10:45:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-26 10:45:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 14871 transitions. [2023-11-26 10:45:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 10:45:06,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:06,713 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:06,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:06,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:45:06,923 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:06,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash -423039227, now seen corresponding path program 1 times [2023-11-26 10:45:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:06,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926081900] [2023-11-26 10:45:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:07,000 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:45:07,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453825441] [2023-11-26 10:45:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:07,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:07,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:07,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:07,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ffacaf-f6ab-43bb-aa00-f5232be6a058/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process