./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-38.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_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/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_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-38.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/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_925224a5-a366-4bb5-bebe-51010e2b5e95/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 9e67c5c4be7150eb59c1243c7ce409eeea38b905cf584c084e1e8e9245e730bf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:02:43,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:02:43,591 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:02:43,596 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:02:43,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:02:43,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:02:43,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:02:43,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:02:43,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:02:43,628 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:02:43,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:02:43,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:02:43,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:02:43,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:02:43,632 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:02:43,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:02:43,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:02:43,633 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:02:43,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:02:43,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:02:43,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:02:43,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:02:43,637 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:02:43,637 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:02:43,638 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:02:43,638 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:02:43,639 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:02:43,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:02:43,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:02:43,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:02:43,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:02:43,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:43,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:02:43,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:02:43,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:02:43,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:02:43,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:02:43,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:02:43,646 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:02:43,646 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:02:43,647 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:02:43,647 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:02:43,647 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_925224a5-a366-4bb5-bebe-51010e2b5e95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e67c5c4be7150eb59c1243c7ce409eeea38b905cf584c084e1e8e9245e730bf [2023-11-26 12:02:43,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:02:43,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:02:43,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:02:43,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:02:43,953 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:02:43,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-38.i [2023-11-26 12:02:47,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:02:47,451 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:02:47,452 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-38.i [2023-11-26 12:02:47,472 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/data/034680090/c3ee57a576c643979d7c8bf56a375d16/FLAGc9b8123c3 [2023-11-26 12:02:47,489 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/data/034680090/c3ee57a576c643979d7c8bf56a375d16 [2023-11-26 12:02:47,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:02:47,498 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:02:47,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:47,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:02:47,508 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:02:47,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:47" (1/1) ... [2023-11-26 12:02:47,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35167ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:47, skipping insertion in model container [2023-11-26 12:02:47,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:47" (1/1) ... [2023-11-26 12:02:47,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:02:47,742 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_925224a5-a366-4bb5-bebe-51010e2b5e95/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-38.i[916,929] [2023-11-26 12:02:47,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:47,970 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:02:47,985 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_925224a5-a366-4bb5-bebe-51010e2b5e95/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-38.i[916,929] [2023-11-26 12:02:48,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:48,151 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:02:48,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48 WrapperNode [2023-11-26 12:02:48,152 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:48,154 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:48,154 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:02:48,154 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:02:48,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,186 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,276 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 565 [2023-11-26 12:02:48,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:48,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:02:48,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:02:48,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:02:48,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,304 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,340 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 12:02:48,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:02:48,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:02:48,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:02:48,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:02:48,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (1/1) ... [2023-11-26 12:02:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:48,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:02:48,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:02:48,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:02:48,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:02:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:02:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:02:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:02:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:02:48,686 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:02:48,689 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:02:49,865 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:02:49,991 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:02:49,991 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:02:49,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:49 BoogieIcfgContainer [2023-11-26 12:02:49,992 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:02:49,995 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:02:49,995 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:02:49,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:02:49,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:02:47" (1/3) ... [2023-11-26 12:02:50,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7e6718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:50, skipping insertion in model container [2023-11-26 12:02:50,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:48" (2/3) ... [2023-11-26 12:02:50,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7e6718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:50, skipping insertion in model container [2023-11-26 12:02:50,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:49" (3/3) ... [2023-11-26 12:02:50,003 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-38.i [2023-11-26 12:02:50,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:02:50,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:02:50,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:02:50,106 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;@79535d65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:02:50,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:02:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 140 states have (on average 1.5642857142857143) internal successors, (219), 141 states have internal predecessors, (219), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:02:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-26 12:02:50,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:50,164 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:50,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:50,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 556636456, now seen corresponding path program 1 times [2023-11-26 12:02:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945622125] [2023-11-26 12:02:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:50,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:50,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945622125] [2023-11-26 12:02:50,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:02:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795517756] [2023-11-26 12:02:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:50,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:50,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:50,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:50,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:02:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:51,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:02:51,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2023-11-26 12:02:51,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:51,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795517756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:51,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:51,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:02:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079655239] [2023-11-26 12:02:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:02:51,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:02:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:02:51,382 INFO L87 Difference]: Start difference. First operand has 223 states, 140 states have (on average 1.5642857142857143) internal successors, (219), 141 states have internal predecessors, (219), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-26 12:02:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:51,497 INFO L93 Difference]: Finished difference Result 443 states and 836 transitions. [2023-11-26 12:02:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:02:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) Word has length 495 [2023-11-26 12:02:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:51,518 INFO L225 Difference]: With dead ends: 443 [2023-11-26 12:02:51,518 INFO L226 Difference]: Without dead ends: 221 [2023-11-26 12:02:51,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:02:51,542 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:51,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 370 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:02:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-26 12:02:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-11-26 12:02:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 139 states have (on average 1.5323741007194245) internal successors, (213), 139 states have internal predecessors, (213), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:02:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 373 transitions. [2023-11-26 12:02:51,648 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 373 transitions. Word has length 495 [2023-11-26 12:02:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:51,653 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 373 transitions. [2023-11-26 12:02:51,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-26 12:02:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 373 transitions. [2023-11-26 12:02:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-26 12:02:51,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:51,673 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:51,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 12:02:51,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1529150948, now seen corresponding path program 1 times [2023-11-26 12:02:51,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:51,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317888987] [2023-11-26 12:02:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:51,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:52,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:52,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276373514] [2023-11-26 12:02:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:52,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:52,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:52,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:02:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:52,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:02:52,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6357 proven. 108 refuted. 0 times theorem prover too weak. 6175 trivial. 0 not checked. [2023-11-26 12:02:53,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 129 proven. 108 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-26 12:02:53,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:53,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317888987] [2023-11-26 12:02:53,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:53,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276373514] [2023-11-26 12:02:53,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276373514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:53,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:53,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 12:02:53,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569719030] [2023-11-26 12:02:53,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:02:53,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:02:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:02:53,622 INFO L87 Difference]: Start difference. First operand 221 states and 373 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-26 12:02:54,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:54,231 INFO L93 Difference]: Finished difference Result 448 states and 750 transitions. [2023-11-26 12:02:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:02:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 495 [2023-11-26 12:02:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:54,238 INFO L225 Difference]: With dead ends: 448 [2023-11-26 12:02:54,238 INFO L226 Difference]: Without dead ends: 228 [2023-11-26 12:02:54,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 982 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 12:02:54,241 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 199 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:54,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 671 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:02:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-26 12:02:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2023-11-26 12:02:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 141 states have (on average 1.49645390070922) internal successors, (211), 141 states have internal predecessors, (211), 80 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:02:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 371 transitions. [2023-11-26 12:02:54,293 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 371 transitions. Word has length 495 [2023-11-26 12:02:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:54,296 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 371 transitions. [2023-11-26 12:02:54,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-26 12:02:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 371 transitions. [2023-11-26 12:02:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-26 12:02:54,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:54,303 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:54,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:54,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:54,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash 508082594, now seen corresponding path program 1 times [2023-11-26 12:02:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:54,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236990373] [2023-11-26 12:02:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:54,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653843625] [2023-11-26 12:02:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:54,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:54,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:54,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:02:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:54,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 12:02:55,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6289 proven. 102 refuted. 0 times theorem prover too weak. 6249 trivial. 0 not checked. [2023-11-26 12:02:55,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 135 proven. 102 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-26 12:02:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236990373] [2023-11-26 12:02:55,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:55,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653843625] [2023-11-26 12:02:55,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653843625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:55,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:55,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 12:02:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594502947] [2023-11-26 12:02:55,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:55,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:02:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:02:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:02:55,950 INFO L87 Difference]: Start difference. First operand 224 states and 371 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-26 12:02:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:56,623 INFO L93 Difference]: Finished difference Result 471 states and 775 transitions. [2023-11-26 12:02:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:02:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 495 [2023-11-26 12:02:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:56,629 INFO L225 Difference]: With dead ends: 471 [2023-11-26 12:02:56,629 INFO L226 Difference]: Without dead ends: 234 [2023-11-26 12:02:56,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 980 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:02:56,631 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 427 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:56,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 929 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:02:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-26 12:02:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2023-11-26 12:02:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.4722222222222223) internal successors, (212), 144 states have internal predecessors, (212), 80 states have call successors, (80), 3 states have call predecessors, (80), 3 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:02:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 372 transitions. [2023-11-26 12:02:56,677 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 372 transitions. Word has length 495 [2023-11-26 12:02:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:56,679 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 372 transitions. [2023-11-26 12:02:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-26 12:02:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 372 transitions. [2023-11-26 12:02:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-26 12:02:56,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:56,686 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:56,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:56,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:56,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1297355740, now seen corresponding path program 1 times [2023-11-26 12:02:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:56,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762000499] [2023-11-26 12:02:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:56,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:56,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:56,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373774704] [2023-11-26 12:02:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:56,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:56,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:57,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:02:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:57,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:02:57,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 3207 proven. 33 refuted. 0 times theorem prover too weak. 9400 trivial. 0 not checked. [2023-11-26 12:02:57,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 204 proven. 33 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-26 12:02:58,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762000499] [2023-11-26 12:02:58,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373774704] [2023-11-26 12:02:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373774704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:58,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 12:02:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139815688] [2023-11-26 12:02:58,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:58,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:02:58,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:02:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:02:58,039 INFO L87 Difference]: Start difference. First operand 228 states and 372 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-26 12:02:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:58,605 INFO L93 Difference]: Finished difference Result 465 states and 752 transitions. [2023-11-26 12:02:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:02:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) Word has length 495 [2023-11-26 12:02:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:58,609 INFO L225 Difference]: With dead ends: 465 [2023-11-26 12:02:58,610 INFO L226 Difference]: Without dead ends: 238 [2023-11-26 12:02:58,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:02:58,613 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 239 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:58,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 665 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:02:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-26 12:02:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2023-11-26 12:02:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 147 states have (on average 1.4557823129251701) internal successors, (214), 147 states have internal predecessors, (214), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:02:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 374 transitions. [2023-11-26 12:02:58,675 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 374 transitions. Word has length 495 [2023-11-26 12:02:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:58,676 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 374 transitions. [2023-11-26 12:02:58,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-26 12:02:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 374 transitions. [2023-11-26 12:02:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:02:58,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:58,682 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:58,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 12:02:58,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:58,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash -611019762, now seen corresponding path program 1 times [2023-11-26 12:02:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:58,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630505086] [2023-11-26 12:02:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:58,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:58,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301428570] [2023-11-26 12:02:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:58,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:58,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:58,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:58,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:02:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:59,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:02:59,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-26 12:02:59,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:59,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630505086] [2023-11-26 12:02:59,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:59,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301428570] [2023-11-26 12:02:59,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301428570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:59,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:59,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:02:59,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366415641] [2023-11-26 12:02:59,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:02:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:02:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:02:59,397 INFO L87 Difference]: Start difference. First operand 232 states and 374 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:02:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:59,468 INFO L93 Difference]: Finished difference Result 467 states and 750 transitions. [2023-11-26 12:02:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:02:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 496 [2023-11-26 12:02:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:59,473 INFO L225 Difference]: With dead ends: 467 [2023-11-26 12:02:59,473 INFO L226 Difference]: Without dead ends: 236 [2023-11-26 12:02:59,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 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 12:02:59,475 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 234 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:59,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 839 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:02:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-26 12:02:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-11-26 12:02:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 150 states have (on average 1.44) internal successors, (216), 150 states have internal predecessors, (216), 80 states have call successors, (80), 5 states have call predecessors, (80), 5 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:02:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 376 transitions. [2023-11-26 12:02:59,545 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 376 transitions. Word has length 496 [2023-11-26 12:02:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:59,547 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 376 transitions. [2023-11-26 12:02:59,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:02:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 376 transitions. [2023-11-26 12:02:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:02:59,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:59,553 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:59,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:59,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:59,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:59,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1428668212, now seen corresponding path program 1 times [2023-11-26 12:02:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827326023] [2023-11-26 12:02:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:59,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:59,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326192604] [2023-11-26 12:02:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:59,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:59,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:59,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:03:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:00,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 12:03:00,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-26 12:03:00,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:00,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:00,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827326023] [2023-11-26 12:03:00,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:00,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326192604] [2023-11-26 12:03:00,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326192604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:00,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:00,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:03:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293479628] [2023-11-26 12:03:00,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:00,548 INFO L87 Difference]: Start difference. First operand 236 states and 376 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:03:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:00,864 INFO L93 Difference]: Finished difference Result 498 states and 797 transitions. [2023-11-26 12:03:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:03:00,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 496 [2023-11-26 12:03:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:00,869 INFO L225 Difference]: With dead ends: 498 [2023-11-26 12:03:00,869 INFO L226 Difference]: Without dead ends: 240 [2023-11-26 12:03:00,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 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 12:03:00,872 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 314 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:00,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 723 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:03:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-26 12:03:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2023-11-26 12:03:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 153 states have (on average 1.4248366013071896) internal successors, (218), 153 states have internal predecessors, (218), 80 states have call successors, (80), 6 states have call predecessors, (80), 6 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-26 12:03:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 378 transitions. [2023-11-26 12:03:00,923 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 378 transitions. Word has length 496 [2023-11-26 12:03:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:00,924 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 378 transitions. [2023-11-26 12:03:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:03:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 378 transitions. [2023-11-26 12:03:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:03:00,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:00,932 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:00,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:01,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:01,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:01,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash -584662710, now seen corresponding path program 1 times [2023-11-26 12:03:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:01,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481853528] [2023-11-26 12:03:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:01,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:01,246 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:01,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483891573] [2023-11-26 12:03:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:01,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:01,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:01,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:03:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:01,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:03:01,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 3319 proven. 201 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2023-11-26 12:03:03,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 36 proven. 201 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-26 12:03:04,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481853528] [2023-11-26 12:03:04,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483891573] [2023-11-26 12:03:04,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483891573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:04,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:04,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-26 12:03:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016334749] [2023-11-26 12:03:04,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:03:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:04,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:03:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:03:04,171 INFO L87 Difference]: Start difference. First operand 240 states and 378 transitions. Second operand has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-26 12:03:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:05,848 INFO L93 Difference]: Finished difference Result 793 states and 1237 transitions. [2023-11-26 12:03:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:03:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) Word has length 496 [2023-11-26 12:03:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:05,855 INFO L225 Difference]: With dead ends: 793 [2023-11-26 12:03:05,855 INFO L226 Difference]: Without dead ends: 554 [2023-11-26 12:03:05,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-11-26 12:03:05,858 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1189 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:05,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 1463 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 12:03:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-11-26 12:03:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 495. [2023-11-26 12:03:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 321 states have (on average 1.4330218068535825) internal successors, (460), 321 states have internal predecessors, (460), 160 states have call successors, (160), 13 states have call predecessors, (160), 13 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-26 12:03:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 780 transitions. [2023-11-26 12:03:05,961 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 780 transitions. Word has length 496 [2023-11-26 12:03:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:05,962 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 780 transitions. [2023-11-26 12:03:05,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-26 12:03:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 780 transitions. [2023-11-26 12:03:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:03:05,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:05,968 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:05,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:06,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:06,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:06,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:06,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1171468724, now seen corresponding path program 1 times [2023-11-26 12:03:06,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:06,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304576901] [2023-11-26 12:03:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:06,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:06,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8708749] [2023-11-26 12:03:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:06,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:06,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:03:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:06,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:03:06,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6387 proven. 123 refuted. 0 times theorem prover too weak. 6130 trivial. 0 not checked. [2023-11-26 12:03:08,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 114 proven. 123 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-26 12:03:09,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304576901] [2023-11-26 12:03:09,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8708749] [2023-11-26 12:03:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8708749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:09,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 12:03:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388822541] [2023-11-26 12:03:09,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:09,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 12:03:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 12:03:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:03:09,047 INFO L87 Difference]: Start difference. First operand 495 states and 780 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-26 12:03:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:10,431 INFO L93 Difference]: Finished difference Result 1515 states and 2366 transitions. [2023-11-26 12:03:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:03:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) Word has length 496 [2023-11-26 12:03:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:10,441 INFO L225 Difference]: With dead ends: 1515 [2023-11-26 12:03:10,442 INFO L226 Difference]: Without dead ends: 1021 [2023-11-26 12:03:10,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:03:10,445 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 768 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:10,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 976 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 12:03:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2023-11-26 12:03:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 503. [2023-11-26 12:03:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 327 states have (on average 1.418960244648318) internal successors, (464), 327 states have internal predecessors, (464), 160 states have call successors, (160), 15 states have call predecessors, (160), 15 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-26 12:03:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 784 transitions. [2023-11-26 12:03:10,640 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 784 transitions. Word has length 496 [2023-11-26 12:03:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:10,641 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 784 transitions. [2023-11-26 12:03:10,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-26 12:03:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 784 transitions. [2023-11-26 12:03:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:03:10,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:10,647 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:10,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:10,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:10,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 751759310, now seen corresponding path program 1 times [2023-11-26 12:03:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733542301] [2023-11-26 12:03:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:10,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:10,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:10,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136307186] [2023-11-26 12:03:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:10,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:10,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:10,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:03:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:11,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 12:03:11,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 7031 proven. 354 refuted. 0 times theorem prover too weak. 5255 trivial. 0 not checked. [2023-11-26 12:03:13,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 120 proven. 117 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-26 12:03:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:13,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733542301] [2023-11-26 12:03:13,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:13,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136307186] [2023-11-26 12:03:13,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136307186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:13,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:13,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2023-11-26 12:03:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604325855] [2023-11-26 12:03:13,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:03:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:03:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:03:13,544 INFO L87 Difference]: Start difference. First operand 503 states and 784 transitions. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 15 states have internal predecessors, (159), 5 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (125), 5 states have call predecessors, (125), 5 states have call successors, (125) [2023-11-26 12:03:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:16,610 INFO L93 Difference]: Finished difference Result 1619 states and 2446 transitions. [2023-11-26 12:03:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 12:03:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 15 states have internal predecessors, (159), 5 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (125), 5 states have call predecessors, (125), 5 states have call successors, (125) Word has length 496 [2023-11-26 12:03:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:16,624 INFO L225 Difference]: With dead ends: 1619 [2023-11-26 12:03:16,624 INFO L226 Difference]: Without dead ends: 1117 [2023-11-26 12:03:16,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2023-11-26 12:03:16,629 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 719 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:16,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1689 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-26 12:03:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2023-11-26 12:03:16,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 535. [2023-11-26 12:03:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 351 states have (on average 1.3846153846153846) internal successors, (486), 351 states have internal predecessors, (486), 160 states have call successors, (160), 23 states have call predecessors, (160), 23 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-26 12:03:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 806 transitions. [2023-11-26 12:03:16,852 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 806 transitions. Word has length 496 [2023-11-26 12:03:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:16,853 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 806 transitions. [2023-11-26 12:03:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 15 states have internal predecessors, (159), 5 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (125), 5 states have call predecessors, (125), 5 states have call successors, (125) [2023-11-26 12:03:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 806 transitions. [2023-11-26 12:03:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:03:16,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:16,861 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:16,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 12:03:17,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:17,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:17,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1492223988, now seen corresponding path program 1 times [2023-11-26 12:03:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:17,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387641304] [2023-11-26 12:03:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:17,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:17,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353055759] [2023-11-26 12:03:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:17,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:17,141 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:17,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:03:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:03:17,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-26 12:03:18,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:18,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387641304] [2023-11-26 12:03:18,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:18,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353055759] [2023-11-26 12:03:18,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353055759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:18,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:18,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:03:18,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114798495] [2023-11-26 12:03:18,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:18,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:03:18,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:03:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:03:18,423 INFO L87 Difference]: Start difference. First operand 535 states and 806 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:03:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:19,321 INFO L93 Difference]: Finished difference Result 2692 states and 4055 transitions. [2023-11-26 12:03:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:03:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 496 [2023-11-26 12:03:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:19,340 INFO L225 Difference]: With dead ends: 2692 [2023-11-26 12:03:19,340 INFO L226 Difference]: Without dead ends: 2158 [2023-11-26 12:03:19,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:19,344 INFO L413 NwaCegarLoop]: 1048 mSDtfsCounter, 725 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:19,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 2112 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:03:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2023-11-26 12:03:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1079. [2023-11-26 12:03:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 712 states have (on average 1.3876404494382022) internal successors, (988), 712 states have internal predecessors, (988), 320 states have call successors, (320), 46 states have call predecessors, (320), 46 states have return successors, (320), 320 states have call predecessors, (320), 320 states have call successors, (320) [2023-11-26 12:03:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1628 transitions. [2023-11-26 12:03:19,737 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1628 transitions. Word has length 496 [2023-11-26 12:03:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:19,738 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1628 transitions. [2023-11-26 12:03:19,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:03:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1628 transitions. [2023-11-26 12:03:19,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-26 12:03:19,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:19,743 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:19,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:19,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:03:19,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:19,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:19,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1234058550, now seen corresponding path program 1 times [2023-11-26 12:03:19,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:19,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037892846] [2023-11-26 12:03:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:19,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:20,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:20,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123903823] [2023-11-26 12:03:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:20,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:20,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:20,077 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:20,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:03:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:20,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:03:20,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-26 12:03:21,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:21,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037892846] [2023-11-26 12:03:21,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123903823] [2023-11-26 12:03:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123903823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:21,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:21,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:03:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289841505] [2023-11-26 12:03:21,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:03:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:03:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:03:21,181 INFO L87 Difference]: Start difference. First operand 1079 states and 1628 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:03:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:22,119 INFO L93 Difference]: Finished difference Result 3236 states and 4874 transitions. [2023-11-26 12:03:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:03:22,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 496 [2023-11-26 12:03:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:22,137 INFO L225 Difference]: With dead ends: 3236 [2023-11-26 12:03:22,137 INFO L226 Difference]: Without dead ends: 2158 [2023-11-26 12:03:22,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:22,142 INFO L413 NwaCegarLoop]: 1077 mSDtfsCounter, 666 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:22,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 2838 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:03:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2023-11-26 12:03:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1067. [2023-11-26 12:03:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 700 states have (on average 1.3814285714285715) internal successors, (967), 700 states have internal predecessors, (967), 320 states have call successors, (320), 46 states have call predecessors, (320), 46 states have return successors, (320), 320 states have call predecessors, (320), 320 states have call successors, (320) [2023-11-26 12:03:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1607 transitions. [2023-11-26 12:03:22,541 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1607 transitions. Word has length 496 [2023-11-26 12:03:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:22,542 INFO L495 AbstractCegarLoop]: Abstraction has 1067 states and 1607 transitions. [2023-11-26 12:03:22,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-26 12:03:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1607 transitions. [2023-11-26 12:03:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-26 12:03:22,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:22,548 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:22,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:22,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 12:03:22,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:22,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash -760260893, now seen corresponding path program 1 times [2023-11-26 12:03:22,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558007195] [2023-11-26 12:03:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:22,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:22,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592684621] [2023-11-26 12:03:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:22,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:22,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:22,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:22,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_925224a5-a366-4bb5-bebe-51010e2b5e95/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:03:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:23,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-26 12:03:23,899 INFO L285 TraceCheckSpWp]: Computing forward predicates...