./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-30.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/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_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-30.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/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_82cc95f9-726f-43ba-93ee-c61d4fbe7562/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 063c198d6cbadf676860cb316f87c54fd753e5e88083f0e3e7a00edd28972590 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:50:20,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:50:20,903 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:50:20,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:50:20,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:50:20,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:50:20,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:50:20,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:50:20,938 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:50:20,939 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:50:20,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:50:20,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:50:20,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:50:20,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:50:20,942 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:50:20,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:50:20,943 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:50:20,944 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:50:20,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:50:20,945 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:50:20,946 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:50:20,946 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:50:20,947 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:50:20,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:50:20,948 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:50:20,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:50:20,949 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:50:20,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:50:20,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:50:20,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:50:20,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:50:20,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:20,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:50:20,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:50:20,953 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:50:20,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:50:20,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:50:20,954 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:50:20,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:50:20,955 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:50:20,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:50:20,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:50:20,956 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_82cc95f9-726f-43ba-93ee-c61d4fbe7562/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 063c198d6cbadf676860cb316f87c54fd753e5e88083f0e3e7a00edd28972590 [2023-11-26 10:50:21,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:50:21,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:50:21,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:50:21,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:50:21,266 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:50:21,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-30.i [2023-11-26 10:50:24,411 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:50:24,712 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:50:24,712 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-30.i [2023-11-26 10:50:24,738 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/data/38c114f91/185c32b37d4540edb2ded1b118031aa4/FLAG62675a0bf [2023-11-26 10:50:24,755 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/data/38c114f91/185c32b37d4540edb2ded1b118031aa4 [2023-11-26 10:50:24,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:50:24,759 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:50:24,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:24,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:50:24,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:50:24,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:24" (1/1) ... [2023-11-26 10:50:24,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488da654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:24, skipping insertion in model container [2023-11-26 10:50:24,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:24" (1/1) ... [2023-11-26 10:50:24,816 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:50:25,038 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_82cc95f9-726f-43ba-93ee-c61d4fbe7562/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-30.i[916,929] [2023-11-26 10:50:25,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:25,200 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:50:25,214 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_82cc95f9-726f-43ba-93ee-c61d4fbe7562/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-30.i[916,929] [2023-11-26 10:50:25,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:25,311 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:50:25,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25 WrapperNode [2023-11-26 10:50:25,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:25,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:25,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:50:25,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:50:25,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,354 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,426 INFO L138 Inliner]: procedures = 26, calls = 87, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 578 [2023-11-26 10:50:25,426 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:25,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:50:25,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:50:25,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:50:25,449 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,456 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,510 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:50:25,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,557 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,598 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,613 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:50:25,614 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:50:25,614 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:50:25,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:50:25,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (1/1) ... [2023-11-26 10:50:25,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:25,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:25,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:50:25,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:50:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:50:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:50:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:50:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:50:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:50:25,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:50:25,991 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:50:25,994 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:50:26,946 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:50:27,019 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:50:27,020 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:50:27,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:27 BoogieIcfgContainer [2023-11-26 10:50:27,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:50:27,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:50:27,025 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:50:27,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:50:27,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:50:24" (1/3) ... [2023-11-26 10:50:27,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa53b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:27, skipping insertion in model container [2023-11-26 10:50:27,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:25" (2/3) ... [2023-11-26 10:50:27,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa53b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:27, skipping insertion in model container [2023-11-26 10:50:27,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:27" (3/3) ... [2023-11-26 10:50:27,035 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-30.i [2023-11-26 10:50:27,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:50:27,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:50:27,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:50:27,149 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;@2bce15d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:50:27,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:50:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 218 states, 141 states have (on average 1.6099290780141844) internal successors, (227), 142 states have internal predecessors, (227), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-26 10:50:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-11-26 10:50:27,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:27,233 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:27,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:27,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:27,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1864218712, now seen corresponding path program 1 times [2023-11-26 10:50:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:27,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400340238] [2023-11-26 10:50:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:27,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400340238] [2023-11-26 10:50:27,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:50:27,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406684415] [2023-11-26 10:50:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:27,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:27,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:27,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:50:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:28,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:50:28,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2023-11-26 10:50:28,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:28,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406684415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:28,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:28,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953587408] [2023-11-26 10:50:28,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:28,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:50:28,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:50:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:50:28,378 INFO L87 Difference]: Start difference. First operand has 218 states, 141 states have (on average 1.6099290780141844) internal successors, (227), 142 states have internal predecessors, (227), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-26 10:50:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:28,462 INFO L93 Difference]: Finished difference Result 433 states and 822 transitions. [2023-11-26 10:50:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:50:28,466 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 2 states have call successors, (74) Word has length 466 [2023-11-26 10:50:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:28,479 INFO L225 Difference]: With dead ends: 433 [2023-11-26 10:50:28,479 INFO L226 Difference]: Without dead ends: 216 [2023-11-26 10:50:28,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:50:28,491 INFO L413 NwaCegarLoop]: 367 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, 367 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:28,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 367 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-26 10:50:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-26 10:50:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 140 states have (on average 1.5857142857142856) internal successors, (222), 140 states have internal predecessors, (222), 74 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-26 10:50:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 370 transitions. [2023-11-26 10:50:28,628 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 370 transitions. Word has length 466 [2023-11-26 10:50:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:28,631 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 370 transitions. [2023-11-26 10:50:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-26 10:50:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 370 transitions. [2023-11-26 10:50:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-11-26 10:50:28,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:28,660 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:28,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:28,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:28,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1763361852, now seen corresponding path program 1 times [2023-11-26 10:50:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19780243] [2023-11-26 10:50:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:29,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:29,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623142028] [2023-11-26 10:50:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:29,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:29,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:29,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:50:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:29,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:50:29,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:50:29,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:29,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:29,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19780243] [2023-11-26 10:50:29,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:29,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623142028] [2023-11-26 10:50:29,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623142028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:29,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:29,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170800459] [2023-11-26 10:50:29,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:29,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:29,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:29,634 INFO L87 Difference]: Start difference. First operand 216 states and 370 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:29,788 INFO L93 Difference]: Finished difference Result 646 states and 1108 transitions. [2023-11-26 10:50:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 466 [2023-11-26 10:50:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:29,807 INFO L225 Difference]: With dead ends: 646 [2023-11-26 10:50:29,808 INFO L226 Difference]: Without dead ends: 431 [2023-11-26 10:50:29,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:29,816 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 360 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:29,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 722 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-26 10:50:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 428. [2023-11-26 10:50:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 277 states have (on average 1.5848375451263539) internal successors, (439), 277 states have internal predecessors, (439), 148 states have call successors, (148), 2 states have call predecessors, (148), 2 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-26 10:50:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 735 transitions. [2023-11-26 10:50:29,940 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 735 transitions. Word has length 466 [2023-11-26 10:50:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:29,943 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 735 transitions. [2023-11-26 10:50:29,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 735 transitions. [2023-11-26 10:50:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-26 10:50:29,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:29,950 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:29,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 10:50:30,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:30,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2147322625, now seen corresponding path program 1 times [2023-11-26 10:50:30,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:30,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551303596] [2023-11-26 10:50:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:30,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:30,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090660057] [2023-11-26 10:50:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:30,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:30,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:30,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:50:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:30,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:50:30,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:50:32,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:32,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551303596] [2023-11-26 10:50:32,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090660057] [2023-11-26 10:50:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090660057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929297950] [2023-11-26 10:50:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:32,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:32,679 INFO L87 Difference]: Start difference. First operand 428 states and 735 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:33,487 INFO L93 Difference]: Finished difference Result 1752 states and 3019 transitions. [2023-11-26 10:50:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:33,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 467 [2023-11-26 10:50:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:33,500 INFO L225 Difference]: With dead ends: 1752 [2023-11-26 10:50:33,500 INFO L226 Difference]: Without dead ends: 1325 [2023-11-26 10:50:33,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:33,504 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 658 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:33,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1468 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:50:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2023-11-26 10:50:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1132. [2023-11-26 10:50:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 789 states have (on average 1.621039290240811) internal successors, (1279), 791 states have internal predecessors, (1279), 336 states have call successors, (336), 6 states have call predecessors, (336), 6 states have return successors, (336), 334 states have call predecessors, (336), 336 states have call successors, (336) [2023-11-26 10:50:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1951 transitions. [2023-11-26 10:50:33,767 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1951 transitions. Word has length 467 [2023-11-26 10:50:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 1132 states and 1951 transitions. [2023-11-26 10:50:33,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1951 transitions. [2023-11-26 10:50:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-26 10:50:33,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:33,781 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:33,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:33,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:33,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:33,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash 301955459, now seen corresponding path program 1 times [2023-11-26 10:50:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:33,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609529332] [2023-11-26 10:50:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:34,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:34,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636674545] [2023-11-26 10:50:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:34,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:34,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:34,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:50:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:34,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:50:34,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:50:34,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:34,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:34,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609529332] [2023-11-26 10:50:34,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:34,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636674545] [2023-11-26 10:50:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636674545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:34,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:34,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166744119] [2023-11-26 10:50:34,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:34,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:34,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:34,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:34,529 INFO L87 Difference]: Start difference. First operand 1132 states and 1951 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:34,683 INFO L93 Difference]: Finished difference Result 2946 states and 5095 transitions. [2023-11-26 10:50:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 467 [2023-11-26 10:50:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:34,703 INFO L225 Difference]: With dead ends: 2946 [2023-11-26 10:50:34,703 INFO L226 Difference]: Without dead ends: 1815 [2023-11-26 10:50:34,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:34,710 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 198 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 839 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2023-11-26 10:50:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1807. [2023-11-26 10:50:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1350 states have (on average 1.6577777777777778) internal successors, (2238), 1358 states have internal predecessors, (2238), 444 states have call successors, (444), 12 states have call predecessors, (444), 12 states have return successors, (444), 436 states have call predecessors, (444), 444 states have call successors, (444) [2023-11-26 10:50:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3126 transitions. [2023-11-26 10:50:34,987 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3126 transitions. Word has length 467 [2023-11-26 10:50:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:34,988 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 3126 transitions. [2023-11-26 10:50:34,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3126 transitions. [2023-11-26 10:50:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-26 10:50:34,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:34,995 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:35,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:35,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:35,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:35,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1158849037, now seen corresponding path program 1 times [2023-11-26 10:50:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665080944] [2023-11-26 10:50:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:35,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:35,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994053639] [2023-11-26 10:50:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:35,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:35,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:50:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:35,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:50:35,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 2925 proven. 33 refuted. 0 times theorem prover too weak. 7846 trivial. 0 not checked. [2023-11-26 10:50:35,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 186 proven. 33 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:50:36,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665080944] [2023-11-26 10:50:36,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:36,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994053639] [2023-11-26 10:50:36,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994053639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:36,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:36,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:50:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852004018] [2023-11-26 10:50:36,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:36,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:50:36,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:50:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:36,335 INFO L87 Difference]: Start difference. First operand 1807 states and 3126 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 10:50:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:37,612 INFO L93 Difference]: Finished difference Result 3761 states and 6456 transitions. [2023-11-26 10:50:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:50:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 467 [2023-11-26 10:50:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:37,633 INFO L225 Difference]: With dead ends: 3761 [2023-11-26 10:50:37,633 INFO L226 Difference]: Without dead ends: 1955 [2023-11-26 10:50:37,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 926 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:50:37,643 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 240 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:37,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1018 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:50:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-11-26 10:50:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1926. [2023-11-26 10:50:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1402 states have (on average 1.6248216833095577) internal successors, (2278), 1411 states have internal predecessors, (2278), 506 states have call successors, (506), 17 states have call predecessors, (506), 17 states have return successors, (506), 497 states have call predecessors, (506), 506 states have call successors, (506) [2023-11-26 10:50:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 3290 transitions. [2023-11-26 10:50:37,974 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 3290 transitions. Word has length 467 [2023-11-26 10:50:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:37,976 INFO L495 AbstractCegarLoop]: Abstraction has 1926 states and 3290 transitions. [2023-11-26 10:50:37,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 10:50:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 3290 transitions. [2023-11-26 10:50:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-26 10:50:37,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:37,983 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:37,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:50:38,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:38,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:38,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2101353345, now seen corresponding path program 1 times [2023-11-26 10:50:38,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:38,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964538047] [2023-11-26 10:50:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:38,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:38,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:38,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640698518] [2023-11-26 10:50:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:38,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:38,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:38,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:50:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:38,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:50:38,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5473 proven. 111 refuted. 0 times theorem prover too weak. 5220 trivial. 0 not checked. [2023-11-26 10:50:39,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 108 proven. 111 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:50:39,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:39,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964538047] [2023-11-26 10:50:39,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:39,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640698518] [2023-11-26 10:50:39,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640698518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:39,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:39,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:50:39,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367393355] [2023-11-26 10:50:39,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:39,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:50:39,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:50:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:39,478 INFO L87 Difference]: Start difference. First operand 1926 states and 3290 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-26 10:50:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:40,092 INFO L93 Difference]: Finished difference Result 3806 states and 6468 transitions. [2023-11-26 10:50:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:50:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) Word has length 468 [2023-11-26 10:50:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:40,144 INFO L225 Difference]: With dead ends: 3806 [2023-11-26 10:50:40,146 INFO L226 Difference]: Without dead ends: 1984 [2023-11-26 10:50:40,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 928 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:50:40,152 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 226 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:40,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 712 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:50:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2023-11-26 10:50:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1946. [2023-11-26 10:50:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1417 states have (on average 1.6069160197600565) internal successors, (2277), 1426 states have internal predecessors, (2277), 506 states have call successors, (506), 22 states have call predecessors, (506), 22 states have return successors, (506), 497 states have call predecessors, (506), 506 states have call successors, (506) [2023-11-26 10:50:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 3289 transitions. [2023-11-26 10:50:40,405 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 3289 transitions. Word has length 468 [2023-11-26 10:50:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:40,406 INFO L495 AbstractCegarLoop]: Abstraction has 1946 states and 3289 transitions. [2023-11-26 10:50:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-26 10:50:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 3289 transitions. [2023-11-26 10:50:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-26 10:50:40,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:40,413 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:40,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:40,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:40,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1296220673, now seen corresponding path program 1 times [2023-11-26 10:50:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084925428] [2023-11-26 10:50:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:40,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:40,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355286748] [2023-11-26 10:50:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:40,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:40,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:50:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:41,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:50:41,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 73 proven. 219 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-26 10:50:41,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:50:42,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:42,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084925428] [2023-11-26 10:50:42,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:42,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355286748] [2023-11-26 10:50:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355286748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:42,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:42,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 10:50:42,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606056242] [2023-11-26 10:50:42,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:50:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:50:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:50:42,436 INFO L87 Difference]: Start difference. First operand 1946 states and 3289 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 1 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-26 10:50:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:43,233 INFO L93 Difference]: Finished difference Result 3874 states and 6487 transitions. [2023-11-26 10:50:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:50:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 1 states have call predecessors, (148), 2 states have call successors, (148) Word has length 468 [2023-11-26 10:50:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:43,251 INFO L225 Difference]: With dead ends: 3874 [2023-11-26 10:50:43,251 INFO L226 Difference]: Without dead ends: 2036 [2023-11-26 10:50:43,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 927 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:50:43,259 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 479 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:43,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 700 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:50:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2023-11-26 10:50:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1998. [2023-11-26 10:50:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1456 states have (on average 1.5741758241758241) internal successors, (2292), 1465 states have internal predecessors, (2292), 506 states have call successors, (506), 35 states have call predecessors, (506), 35 states have return successors, (506), 497 states have call predecessors, (506), 506 states have call successors, (506) [2023-11-26 10:50:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3304 transitions. [2023-11-26 10:50:43,503 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3304 transitions. Word has length 468 [2023-11-26 10:50:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:43,504 INFO L495 AbstractCegarLoop]: Abstraction has 1998 states and 3304 transitions. [2023-11-26 10:50:43,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 1 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-26 10:50:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3304 transitions. [2023-11-26 10:50:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-26 10:50:43,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:43,510 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:43,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:43,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:43,718 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:43,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1926428057, now seen corresponding path program 1 times [2023-11-26 10:50:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654046522] [2023-11-26 10:50:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:43,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:43,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814970049] [2023-11-26 10:50:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:43,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:43,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:43,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:50:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:44,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:50:44,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:50:44,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654046522] [2023-11-26 10:50:44,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814970049] [2023-11-26 10:50:44,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814970049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:44,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:44,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55028989] [2023-11-26 10:50:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:44,216 INFO L87 Difference]: Start difference. First operand 1998 states and 3304 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:44,409 INFO L93 Difference]: Finished difference Result 3884 states and 6437 transitions. [2023-11-26 10:50:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 469 [2023-11-26 10:50:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:44,425 INFO L225 Difference]: With dead ends: 3884 [2023-11-26 10:50:44,425 INFO L226 Difference]: Without dead ends: 1998 [2023-11-26 10:50:44,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:44,433 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 20 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:44,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 683 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2023-11-26 10:50:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1998. [2023-11-26 10:50:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1456 states have (on average 1.565934065934066) internal successors, (2280), 1465 states have internal predecessors, (2280), 506 states have call successors, (506), 35 states have call predecessors, (506), 35 states have return successors, (506), 497 states have call predecessors, (506), 506 states have call successors, (506) [2023-11-26 10:50:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3292 transitions. [2023-11-26 10:50:44,720 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3292 transitions. Word has length 469 [2023-11-26 10:50:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:44,721 INFO L495 AbstractCegarLoop]: Abstraction has 1998 states and 3292 transitions. [2023-11-26 10:50:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3292 transitions. [2023-11-26 10:50:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-26 10:50:44,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:44,728 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:44,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:44,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:44,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:44,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1874972362, now seen corresponding path program 1 times [2023-11-26 10:50:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:44,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098947262] [2023-11-26 10:50:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:44,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:44,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229548866] [2023-11-26 10:50:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:44,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:44,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:45,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:45,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:50:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:45,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:50:45,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:50:46,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:46,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098947262] [2023-11-26 10:50:46,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229548866] [2023-11-26 10:50:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229548866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:46,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:46,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843621111] [2023-11-26 10:50:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:46,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:46,078 INFO L87 Difference]: Start difference. First operand 1998 states and 3292 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:46,696 INFO L93 Difference]: Finished difference Result 6036 states and 9955 transitions. [2023-11-26 10:50:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 470 [2023-11-26 10:50:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:46,729 INFO L225 Difference]: With dead ends: 6036 [2023-11-26 10:50:46,729 INFO L226 Difference]: Without dead ends: 4150 [2023-11-26 10:50:46,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:46,737 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 344 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:46,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1106 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:50:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2023-11-26 10:50:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3882. [2023-11-26 10:50:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3882 states, 2864 states have (on average 1.5712290502793296) internal successors, (4500), 2881 states have internal predecessors, (4500), 950 states have call successors, (950), 67 states have call predecessors, (950), 67 states have return successors, (950), 933 states have call predecessors, (950), 950 states have call successors, (950) [2023-11-26 10:50:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 6400 transitions. [2023-11-26 10:50:47,384 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 6400 transitions. Word has length 470 [2023-11-26 10:50:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:47,385 INFO L495 AbstractCegarLoop]: Abstraction has 3882 states and 6400 transitions. [2023-11-26 10:50:47,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 6400 transitions. [2023-11-26 10:50:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-26 10:50:47,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:47,393 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:47,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:47,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:50:47,603 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:47,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1062226210, now seen corresponding path program 1 times [2023-11-26 10:50:47,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:47,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965626449] [2023-11-26 10:50:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:47,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829710701] [2023-11-26 10:50:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:47,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:47,660 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:47,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:50:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:48,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:50:48,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2023-11-26 10:50:50,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:50,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:50,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965626449] [2023-11-26 10:50:50,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:50:50,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829710701] [2023-11-26 10:50:50,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829710701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:50,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:50,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:50,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108200983] [2023-11-26 10:50:50,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:50,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:50,600 INFO L87 Difference]: Start difference. First operand 3882 states and 6400 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:53,823 INFO L93 Difference]: Finished difference Result 19022 states and 31294 transitions. [2023-11-26 10:50:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:50:53,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) Word has length 471 [2023-11-26 10:50:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:53,924 INFO L225 Difference]: With dead ends: 19022 [2023-11-26 10:50:53,924 INFO L226 Difference]: Without dead ends: 15252 [2023-11-26 10:50:53,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 467 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 10:50:53,975 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 1284 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:53,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 1662 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 10:50:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15252 states. [2023-11-26 10:50:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15252 to 15210. [2023-11-26 10:50:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15210 states, 11416 states have (on average 1.5683251576734407) internal successors, (17904), 11505 states have internal predecessors, (17904), 3518 states have call successors, (3518), 275 states have call predecessors, (3518), 275 states have return successors, (3518), 3429 states have call predecessors, (3518), 3518 states have call successors, (3518) [2023-11-26 10:50:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 24940 transitions. [2023-11-26 10:50:56,566 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 24940 transitions. Word has length 471 [2023-11-26 10:50:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:56,567 INFO L495 AbstractCegarLoop]: Abstraction has 15210 states and 24940 transitions. [2023-11-26 10:50:56,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (74), 1 states have call predecessors, (74), 1 states have return successors, (74), 1 states have call predecessors, (74), 1 states have call successors, (74) [2023-11-26 10:50:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 24940 transitions. [2023-11-26 10:50:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-26 10:50:56,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:56,586 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:56,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:50:56,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:56,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:56,798 INFO L85 PathProgramCache]: Analyzing trace with hash 218220708, now seen corresponding path program 1 times [2023-11-26 10:50:56,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:56,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569356646] [2023-11-26 10:50:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:56,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:56,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:50:56,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042836997] [2023-11-26 10:50:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:56,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:56,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:56,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:56,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cc95f9-726f-43ba-93ee-c61d4fbe7562/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:50:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:57,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:50:57,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:51:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 4923 proven. 144 refuted. 0 times theorem prover too weak. 5737 trivial. 0 not checked. [2023-11-26 10:51:00,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:51:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 75 proven. 144 refuted. 0 times theorem prover too weak. 10585 trivial. 0 not checked. [2023-11-26 10:51:05,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:51:05,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569356646] [2023-11-26 10:51:05,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:51:05,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042836997] [2023-11-26 10:51:05,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042836997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:51:05,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:51:05,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-26 10:51:05,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570029205] [2023-11-26 10:51:05,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:51:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:51:05,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:51:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:51:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:51:05,193 INFO L87 Difference]: Start difference. First operand 15210 states and 24940 transitions. Second operand has 16 states, 16 states have (on average 11.4375) internal successors, (183), 16 states have internal predecessors, (183), 4 states have call successors, (148), 3 states have call predecessors, (148), 5 states have return successors, (148), 4 states have call predecessors, (148), 4 states have call successors, (148)