./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-13.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/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_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-13.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/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_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/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 d5194ca2a271eb4c42f992f5d7dece7ecd9a6b07ea3e315005d3dcdd4e1a968f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:43,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:43,946 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:56:43,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:43,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:43,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:43,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:43,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:43,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:43,980 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:43,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:43,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:43,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:43,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:43,983 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:43,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:43,984 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:56:43,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:56:43,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:43,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:56:43,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:43,987 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:56:43,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:43,988 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:56:43,989 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:56:43,989 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:56:43,989 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:43,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:43,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:43,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:43,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:43,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:43,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:43,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:43,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:56:43,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:56:43,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:56:43,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:43,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:43,995 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:56:43,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:43,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:43,996 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_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5194ca2a271eb4c42f992f5d7dece7ecd9a6b07ea3e315005d3dcdd4e1a968f [2023-11-26 11:56:44,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:44,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:44,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:44,267 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:44,268 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:44,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-13.i [2023-11-26 11:56:47,578 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:56:47,957 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:56:47,958 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-13.i [2023-11-26 11:56:47,981 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/data/befd55901/f9a67648f32e40dbbf9567fa289c6a86/FLAG2d7a228cc [2023-11-26 11:56:48,000 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/data/befd55901/f9a67648f32e40dbbf9567fa289c6a86 [2023-11-26 11:56:48,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:56:48,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:56:48,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:48,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:56:48,015 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:56:48,016 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:48,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcf93a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48, skipping insertion in model container [2023-11-26 11:56:48,018 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:48,086 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:56:48,263 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_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-13.i[916,929] [2023-11-26 11:56:48,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:48,582 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:56:48,595 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_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-13.i[916,929] [2023-11-26 11:56:48,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:48,838 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:56:48,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48 WrapperNode [2023-11-26 11:56:48,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:48,840 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:48,840 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:56:48,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:56:48,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:48,884 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,036 INFO L138 Inliner]: procedures = 26, calls = 92, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 722 [2023-11-26 11:56:49,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:49,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:56:49,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:56:49,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:56:49,050 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,074 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,204 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:56:49,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,284 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:56:49,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:56:49,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:56:49,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:56:49,356 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (1/1) ... [2023-11-26 11:56:49,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:49,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:56:49,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:56:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:56:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:56:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:56:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:56:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:56:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:56:49,583 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:56:49,586 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:56:50,997 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:56:51,057 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:56:51,058 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:56:51,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:51 BoogieIcfgContainer [2023-11-26 11:56:51,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:56:51,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:56:51,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:56:51,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:56:51,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:56:48" (1/3) ... [2023-11-26 11:56:51,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c42101f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:51, skipping insertion in model container [2023-11-26 11:56:51,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:48" (2/3) ... [2023-11-26 11:56:51,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c42101f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:51, skipping insertion in model container [2023-11-26 11:56:51,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:51" (3/3) ... [2023-11-26 11:56:51,068 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-13.i [2023-11-26 11:56:51,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:56:51,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:56:51,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:56:51,155 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;@57164bea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:56:51,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:56:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 197 states have (on average 1.5939086294416243) internal successors, (314), 198 states have internal predecessors, (314), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-26 11:56:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-26 11:56:51,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:51,203 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:51,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:51,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash -320492981, now seen corresponding path program 1 times [2023-11-26 11:56:51,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:51,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032791754] [2023-11-26 11:56:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:51,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:51,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472375637] [2023-11-26 11:56:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:51,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:51,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:51,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:56:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:52,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:56:52,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:56:53,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:53,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:53,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032791754] [2023-11-26 11:56:53,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472375637] [2023-11-26 11:56:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472375637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:53,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:56:53,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852720741] [2023-11-26 11:56:53,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:53,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:56:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:56:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:56:53,264 INFO L87 Difference]: Start difference. First operand has 279 states, 197 states have (on average 1.5939086294416243) internal successors, (314), 198 states have internal predecessors, (314), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:56:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:53,871 INFO L93 Difference]: Finished difference Result 828 states and 1565 transitions. [2023-11-26 11:56:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:56:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 527 [2023-11-26 11:56:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:53,894 INFO L225 Difference]: With dead ends: 828 [2023-11-26 11:56:53,895 INFO L226 Difference]: Without dead ends: 550 [2023-11-26 11:56:53,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:56:53,906 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 561 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:53,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1462 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:56:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-26 11:56:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 407. [2023-11-26 11:56:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 246 states have (on average 1.4552845528455285) internal successors, (358), 246 states have internal predecessors, (358), 158 states have call successors, (158), 2 states have call predecessors, (158), 2 states have return successors, (158), 158 states have call predecessors, (158), 158 states have call successors, (158) [2023-11-26 11:56:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 674 transitions. [2023-11-26 11:56:54,072 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 674 transitions. Word has length 527 [2023-11-26 11:56:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:54,075 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 674 transitions. [2023-11-26 11:56:54,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:56:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 674 transitions. [2023-11-26 11:56:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-26 11:56:54,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:54,100 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:54,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:56:54,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:56:54,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:54,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1153846681, now seen corresponding path program 1 times [2023-11-26 11:56:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:54,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336374311] [2023-11-26 11:56:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:54,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:54,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:54,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874131672] [2023-11-26 11:56:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:54,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:54,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:54,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:56:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:54,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:56:54,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:56:55,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336374311] [2023-11-26 11:56:55,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874131672] [2023-11-26 11:56:55,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874131672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:55,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:55,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:55,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222869701] [2023-11-26 11:56:55,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:55,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:55,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:55,031 INFO L87 Difference]: Start difference. First operand 407 states and 674 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:56:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:55,170 INFO L93 Difference]: Finished difference Result 851 states and 1419 transitions. [2023-11-26 11:56:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 528 [2023-11-26 11:56:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:55,178 INFO L225 Difference]: With dead ends: 851 [2023-11-26 11:56:55,178 INFO L226 Difference]: Without dead ends: 577 [2023-11-26 11:56:55,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:55,181 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 263 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:55,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 890 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:56:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-26 11:56:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 574. [2023-11-26 11:56:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 395 states have (on average 1.5291139240506328) internal successors, (604), 396 states have internal predecessors, (604), 174 states have call successors, (174), 4 states have call predecessors, (174), 4 states have return successors, (174), 173 states have call predecessors, (174), 174 states have call successors, (174) [2023-11-26 11:56:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 952 transitions. [2023-11-26 11:56:55,256 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 952 transitions. Word has length 528 [2023-11-26 11:56:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:55,258 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 952 transitions. [2023-11-26 11:56:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:56:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 952 transitions. [2023-11-26 11:56:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-26 11:56:55,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:55,272 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:55,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:55,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:55,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 223740199, now seen corresponding path program 1 times [2023-11-26 11:56:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771051366] [2023-11-26 11:56:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:55,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:55,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263978440] [2023-11-26 11:56:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:55,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:55,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:55,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:56:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:56,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:56:56,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:56:56,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771051366] [2023-11-26 11:56:56,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263978440] [2023-11-26 11:56:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263978440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:56,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:56,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289043794] [2023-11-26 11:56:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:56,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:56,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:56,166 INFO L87 Difference]: Start difference. First operand 574 states and 952 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:00,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:57:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:00,415 INFO L93 Difference]: Finished difference Result 1442 states and 2413 transitions. [2023-11-26 11:57:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 528 [2023-11-26 11:57:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:00,426 INFO L225 Difference]: With dead ends: 1442 [2023-11-26 11:57:00,427 INFO L226 Difference]: Without dead ends: 1005 [2023-11-26 11:57:00,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:00,435 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 431 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:00,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 890 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-26 11:57:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2023-11-26 11:57:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1003. [2023-11-26 11:57:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 727 states have (on average 1.5515818431911967) internal successors, (1128), 729 states have internal predecessors, (1128), 269 states have call successors, (269), 6 states have call predecessors, (269), 6 states have return successors, (269), 267 states have call predecessors, (269), 269 states have call successors, (269) [2023-11-26 11:57:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1666 transitions. [2023-11-26 11:57:00,601 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1666 transitions. Word has length 528 [2023-11-26 11:57:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:00,606 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1666 transitions. [2023-11-26 11:57:00,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1666 transitions. [2023-11-26 11:57:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-26 11:57:00,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:00,623 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:00,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:00,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:00,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:00,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1140340741, now seen corresponding path program 1 times [2023-11-26 11:57:00,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:00,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161877353] [2023-11-26 11:57:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:00,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206359310] [2023-11-26 11:57:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:00,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:00,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:00,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:57:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:01,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:01,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:01,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:01,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161877353] [2023-11-26 11:57:01,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206359310] [2023-11-26 11:57:01,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206359310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:01,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:01,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597983827] [2023-11-26 11:57:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:01,506 INFO L87 Difference]: Start difference. First operand 1003 states and 1666 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:01,718 INFO L93 Difference]: Finished difference Result 2673 states and 4460 transitions. [2023-11-26 11:57:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 529 [2023-11-26 11:57:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:01,733 INFO L225 Difference]: With dead ends: 2673 [2023-11-26 11:57:01,733 INFO L226 Difference]: Without dead ends: 1807 [2023-11-26 11:57:01,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:01,737 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 413 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:01,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 906 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-11-26 11:57:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1123. [2023-11-26 11:57:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 847 states have (on average 1.5820543093270365) internal successors, (1340), 849 states have internal predecessors, (1340), 269 states have call successors, (269), 6 states have call predecessors, (269), 6 states have return successors, (269), 267 states have call predecessors, (269), 269 states have call successors, (269) [2023-11-26 11:57:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1878 transitions. [2023-11-26 11:57:01,937 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1878 transitions. Word has length 529 [2023-11-26 11:57:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:01,938 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1878 transitions. [2023-11-26 11:57:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1878 transitions. [2023-11-26 11:57:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-26 11:57:01,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:01,954 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:01,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:02,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:02,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:02,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash 296335239, now seen corresponding path program 1 times [2023-11-26 11:57:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:02,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147186657] [2023-11-26 11:57:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:02,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:02,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217134965] [2023-11-26 11:57:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:02,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:02,276 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:02,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:57:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:02,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:57:02,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:02,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:02,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:02,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147186657] [2023-11-26 11:57:02,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217134965] [2023-11-26 11:57:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217134965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:02,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:02,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571874296] [2023-11-26 11:57:02,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:02,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:02,881 INFO L87 Difference]: Start difference. First operand 1123 states and 1878 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:07,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:57:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:07,331 INFO L93 Difference]: Finished difference Result 3573 states and 5996 transitions. [2023-11-26 11:57:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 529 [2023-11-26 11:57:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:07,351 INFO L225 Difference]: With dead ends: 3573 [2023-11-26 11:57:07,351 INFO L226 Difference]: Without dead ends: 2587 [2023-11-26 11:57:07,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:07,358 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 685 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:07,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1184 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-26 11:57:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-11-26 11:57:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1939. [2023-11-26 11:57:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1586 states have (on average 1.6128625472887768) internal successors, (2558), 1592 states have internal predecessors, (2558), 341 states have call successors, (341), 11 states have call predecessors, (341), 11 states have return successors, (341), 335 states have call predecessors, (341), 341 states have call successors, (341) [2023-11-26 11:57:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3240 transitions. [2023-11-26 11:57:07,564 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3240 transitions. Word has length 529 [2023-11-26 11:57:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:07,566 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3240 transitions. [2023-11-26 11:57:07,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3240 transitions. [2023-11-26 11:57:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-26 11:57:07,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:07,575 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:07,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:07,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:07,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:07,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash 857035017, now seen corresponding path program 1 times [2023-11-26 11:57:07,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:07,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168039425] [2023-11-26 11:57:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:07,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:07,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:07,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513633511] [2023-11-26 11:57:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:07,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:07,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:07,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:57:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:08,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:08,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:08,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:08,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:08,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168039425] [2023-11-26 11:57:08,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:08,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513633511] [2023-11-26 11:57:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513633511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:08,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:08,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:57:08,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108554634] [2023-11-26 11:57:08,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:08,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:57:08,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:57:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:57:08,863 INFO L87 Difference]: Start difference. First operand 1939 states and 3240 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:10,672 INFO L93 Difference]: Finished difference Result 8549 states and 14207 transitions. [2023-11-26 11:57:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 529 [2023-11-26 11:57:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:10,752 INFO L225 Difference]: With dead ends: 8549 [2023-11-26 11:57:10,753 INFO L226 Difference]: Without dead ends: 6751 [2023-11-26 11:57:10,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:10,758 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 2419 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:10,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2419 Valid, 2347 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:57:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2023-11-26 11:57:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 4356. [2023-11-26 11:57:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 3702 states have (on average 1.609670448406267) internal successors, (5959), 3720 states have internal predecessors, (5959), 625 states have call successors, (625), 28 states have call predecessors, (625), 28 states have return successors, (625), 607 states have call predecessors, (625), 625 states have call successors, (625) [2023-11-26 11:57:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 7209 transitions. [2023-11-26 11:57:11,152 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 7209 transitions. Word has length 529 [2023-11-26 11:57:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:11,153 INFO L495 AbstractCegarLoop]: Abstraction has 4356 states and 7209 transitions. [2023-11-26 11:57:11,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 7209 transitions. [2023-11-26 11:57:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2023-11-26 11:57:11,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:11,165 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:11,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:11,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:11,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:11,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1171551093, now seen corresponding path program 1 times [2023-11-26 11:57:11,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:11,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928702651] [2023-11-26 11:57:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:11,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:11,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:11,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065696783] [2023-11-26 11:57:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:11,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:11,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:11,494 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:11,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:57:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:11,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:57:11,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 1128 proven. 9 refuted. 0 times theorem prover too weak. 11187 trivial. 0 not checked. [2023-11-26 11:57:12,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 225 proven. 9 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:57:12,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:12,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928702651] [2023-11-26 11:57:12,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:12,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065696783] [2023-11-26 11:57:12,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065696783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:12,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:12,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-26 11:57:12,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746914106] [2023-11-26 11:57:12,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:12,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:57:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:57:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:57:12,431 INFO L87 Difference]: Start difference. First operand 4356 states and 7209 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 2 states have call successors, (82), 2 states have call predecessors, (82), 4 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-26 11:57:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:14,575 INFO L93 Difference]: Finished difference Result 11708 states and 19248 transitions. [2023-11-26 11:57:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:57:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 2 states have call successors, (82), 2 states have call predecessors, (82), 4 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) Word has length 529 [2023-11-26 11:57:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:14,637 INFO L225 Difference]: With dead ends: 11708 [2023-11-26 11:57:14,638 INFO L226 Difference]: Without dead ends: 7497 [2023-11-26 11:57:14,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1047 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:57:14,648 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 1667 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:14,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1743 Valid, 2765 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-26 11:57:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7497 states. [2023-11-26 11:57:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7497 to 4388. [2023-11-26 11:57:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 3731 states have (on average 1.6049316537121414) internal successors, (5988), 3749 states have internal predecessors, (5988), 625 states have call successors, (625), 31 states have call predecessors, (625), 31 states have return successors, (625), 607 states have call predecessors, (625), 625 states have call successors, (625) [2023-11-26 11:57:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 7238 transitions. [2023-11-26 11:57:15,158 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 7238 transitions. Word has length 529 [2023-11-26 11:57:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:15,159 INFO L495 AbstractCegarLoop]: Abstraction has 4388 states and 7238 transitions. [2023-11-26 11:57:15,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 2 states have call successors, (82), 2 states have call predecessors, (82), 4 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-26 11:57:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 7238 transitions. [2023-11-26 11:57:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-26 11:57:15,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:15,174 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:15,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:15,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:15,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:15,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash 251399868, now seen corresponding path program 1 times [2023-11-26 11:57:15,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:15,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996084184] [2023-11-26 11:57:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:15,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569604736] [2023-11-26 11:57:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:15,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:15,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:57:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:15,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:57:15,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 3378 proven. 36 refuted. 0 times theorem prover too weak. 8910 trivial. 0 not checked. [2023-11-26 11:57:16,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 198 proven. 36 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:57:16,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:16,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996084184] [2023-11-26 11:57:16,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:16,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569604736] [2023-11-26 11:57:16,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569604736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:16,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:57:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732432131] [2023-11-26 11:57:16,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:16,533 INFO L87 Difference]: Start difference. First operand 4388 states and 7238 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-26 11:57:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:17,241 INFO L93 Difference]: Finished difference Result 8675 states and 14296 transitions. [2023-11-26 11:57:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 530 [2023-11-26 11:57:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:17,272 INFO L225 Difference]: With dead ends: 8675 [2023-11-26 11:57:17,273 INFO L226 Difference]: Without dead ends: 4436 [2023-11-26 11:57:17,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1052 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 11:57:17,282 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 344 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:17,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 961 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:57:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2023-11-26 11:57:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 4400. [2023-11-26 11:57:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 3740 states have (on average 1.5991978609625668) internal successors, (5981), 3758 states have internal predecessors, (5981), 625 states have call successors, (625), 34 states have call predecessors, (625), 34 states have return successors, (625), 607 states have call predecessors, (625), 625 states have call successors, (625) [2023-11-26 11:57:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 7231 transitions. [2023-11-26 11:57:17,764 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 7231 transitions. Word has length 530 [2023-11-26 11:57:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:17,765 INFO L495 AbstractCegarLoop]: Abstraction has 4400 states and 7231 transitions. [2023-11-26 11:57:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-26 11:57:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 7231 transitions. [2023-11-26 11:57:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-26 11:57:17,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:17,778 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:17,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:57:17,987 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:17,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash -241226306, now seen corresponding path program 1 times [2023-11-26 11:57:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:17,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320384634] [2023-11-26 11:57:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:18,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:18,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776811483] [2023-11-26 11:57:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:18,078 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:18,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:57:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:18,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:57:18,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6220 proven. 123 refuted. 0 times theorem prover too weak. 5981 trivial. 0 not checked. [2023-11-26 11:57:19,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 111 proven. 123 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:57:19,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:19,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320384634] [2023-11-26 11:57:19,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776811483] [2023-11-26 11:57:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776811483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:19,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 11:57:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834514061] [2023-11-26 11:57:19,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:19,531 INFO L87 Difference]: Start difference. First operand 4400 states and 7231 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-26 11:57:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:21,022 INFO L93 Difference]: Finished difference Result 8330 states and 13662 transitions. [2023-11-26 11:57:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:57:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 530 [2023-11-26 11:57:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:21,054 INFO L225 Difference]: With dead ends: 8330 [2023-11-26 11:57:21,061 INFO L226 Difference]: Without dead ends: 4083 [2023-11-26 11:57:21,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1051 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:57:21,071 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 583 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:21,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1517 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:57:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2023-11-26 11:57:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 3780. [2023-11-26 11:57:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3780 states, 3117 states have (on average 1.5572666025024062) internal successors, (4854), 3135 states have internal predecessors, (4854), 625 states have call successors, (625), 37 states have call predecessors, (625), 37 states have return successors, (625), 607 states have call predecessors, (625), 625 states have call successors, (625) [2023-11-26 11:57:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3780 states to 3780 states and 6104 transitions. [2023-11-26 11:57:21,478 INFO L78 Accepts]: Start accepts. Automaton has 3780 states and 6104 transitions. Word has length 530 [2023-11-26 11:57:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:21,479 INFO L495 AbstractCegarLoop]: Abstraction has 3780 states and 6104 transitions. [2023-11-26 11:57:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-26 11:57:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3780 states and 6104 transitions. [2023-11-26 11:57:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-26 11:57:21,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:21,513 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:21,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:21,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:57:21,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:21,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1623083291, now seen corresponding path program 1 times [2023-11-26 11:57:21,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:21,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125540407] [2023-11-26 11:57:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:21,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830920488] [2023-11-26 11:57:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:21,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:21,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:21,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:57:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:57:22,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:22,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125540407] [2023-11-26 11:57:22,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830920488] [2023-11-26 11:57:22,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830920488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:57:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192507610] [2023-11-26 11:57:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:57:22,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:57:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:57:22,394 INFO L87 Difference]: Start difference. First operand 3780 states and 6104 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:24,181 INFO L93 Difference]: Finished difference Result 12526 states and 20307 transitions. [2023-11-26 11:57:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 530 [2023-11-26 11:57:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:24,211 INFO L225 Difference]: With dead ends: 12526 [2023-11-26 11:57:24,211 INFO L226 Difference]: Without dead ends: 8903 [2023-11-26 11:57:24,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:24,222 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 1475 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:24,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 1986 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:57:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8903 states. [2023-11-26 11:57:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8903 to 7797. [2023-11-26 11:57:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 6558 states have (on average 1.5661787130222629) internal successors, (10271), 6594 states have internal predecessors, (10271), 1171 states have call successors, (1171), 67 states have call predecessors, (1171), 67 states have return successors, (1171), 1135 states have call predecessors, (1171), 1171 states have call successors, (1171) [2023-11-26 11:57:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 12613 transitions. [2023-11-26 11:57:25,047 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 12613 transitions. Word has length 530 [2023-11-26 11:57:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:25,049 INFO L495 AbstractCegarLoop]: Abstraction has 7797 states and 12613 transitions. [2023-11-26 11:57:25,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 12613 transitions. [2023-11-26 11:57:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-26 11:57:25,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:25,066 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:25,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:25,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:25,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1672752279, now seen corresponding path program 1 times [2023-11-26 11:57:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:25,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853343774] [2023-11-26 11:57:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:25,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:25,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080394522] [2023-11-26 11:57:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:25,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:25,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:57:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:25,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:57:25,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:27,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:27,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:27,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853343774] [2023-11-26 11:57:27,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080394522] [2023-11-26 11:57:27,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080394522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:27,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:27,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:27,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771434423] [2023-11-26 11:57:27,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:27,661 INFO L87 Difference]: Start difference. First operand 7797 states and 12613 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:32,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:57:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:32,609 INFO L93 Difference]: Finished difference Result 18109 states and 29366 transitions. [2023-11-26 11:57:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 530 [2023-11-26 11:57:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:32,642 INFO L225 Difference]: With dead ends: 18109 [2023-11-26 11:57:32,642 INFO L226 Difference]: Without dead ends: 10469 [2023-11-26 11:57:32,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 527 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 11:57:32,663 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 307 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 160 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:32,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1329 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 42 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-11-26 11:57:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10469 states. [2023-11-26 11:57:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10469 to 7843. [2023-11-26 11:57:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7843 states, 6604 states have (on average 1.5645063597819504) internal successors, (10332), 6640 states have internal predecessors, (10332), 1171 states have call successors, (1171), 67 states have call predecessors, (1171), 67 states have return successors, (1171), 1135 states have call predecessors, (1171), 1171 states have call successors, (1171) [2023-11-26 11:57:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7843 states to 7843 states and 12674 transitions. [2023-11-26 11:57:33,562 INFO L78 Accepts]: Start accepts. Automaton has 7843 states and 12674 transitions. Word has length 530 [2023-11-26 11:57:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:33,563 INFO L495 AbstractCegarLoop]: Abstraction has 7843 states and 12674 transitions. [2023-11-26 11:57:33,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7843 states and 12674 transitions. [2023-11-26 11:57:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-11-26 11:57:33,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:33,574 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:33,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:33,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:33,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash -56325341, now seen corresponding path program 1 times [2023-11-26 11:57:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095392315] [2023-11-26 11:57:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:33,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266655691] [2023-11-26 11:57:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:33,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:33,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:33,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c3c1f5-b785-406f-8f67-a5f00c87b6f8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:57:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:57:34,391 INFO L285 TraceCheckSpWp]: Computing forward predicates...