./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-84.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_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/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_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-84.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/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_498e470c-d119-4fe5-9f26-bff0fc8c7757/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 925e9b76051eff442eff54c72fd139be6e9d1af6b77433b45103df887e08e16e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:18,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:18,734 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:18,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:18,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:18,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:18,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:18,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:18,790 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:18,796 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:18,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:18,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:18,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:18,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:18,801 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:18,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:18,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:18,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:18,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:18,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:18,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:18,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:18,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:18,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:18,807 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:18,807 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:18,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:18,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:18,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:18,810 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:18,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:18,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:18,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:18,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:18,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:18,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:18,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:18,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:18,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:18,815 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:18,815 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:18,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:18,816 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_498e470c-d119-4fe5-9f26-bff0fc8c7757/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 925e9b76051eff442eff54c72fd139be6e9d1af6b77433b45103df887e08e16e [2023-11-26 10:48:19,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:19,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:19,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:19,222 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:19,222 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:19,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-84.i [2023-11-26 10:48:22,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:22,779 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:22,780 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-84.i [2023-11-26 10:48:22,790 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/data/d07dd3b0d/81b9f6c84e634540bc1738a1a9c73439/FLAG86cabf802 [2023-11-26 10:48:22,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/data/d07dd3b0d/81b9f6c84e634540bc1738a1a9c73439 [2023-11-26 10:48:22,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:22,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:22,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:22,823 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:22,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:22,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:22" (1/1) ... [2023-11-26 10:48:22,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641269c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:22, skipping insertion in model container [2023-11-26 10:48:22,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:22" (1/1) ... [2023-11-26 10:48:22,872 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:23,014 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_498e470c-d119-4fe5-9f26-bff0fc8c7757/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-84.i[919,932] [2023-11-26 10:48:23,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:23,089 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:23,102 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_498e470c-d119-4fe5-9f26-bff0fc8c7757/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-84.i[919,932] [2023-11-26 10:48:23,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:23,180 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:23,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23 WrapperNode [2023-11-26 10:48:23,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:23,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:23,183 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:23,183 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:23,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,203 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,271 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 183 [2023-11-26 10:48:23,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:23,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:23,273 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:23,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:23,283 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,287 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,306 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 10:48:23,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:23,337 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:23,337 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:23,338 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:23,338 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (1/1) ... [2023-11-26 10:48:23,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:23,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:23,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:48:23,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:48:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:23,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:23,510 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:23,512 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:24,054 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:24,092 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:24,093 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:48:24,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:24 BoogieIcfgContainer [2023-11-26 10:48:24,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:24,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:24,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:24,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:24,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:22" (1/3) ... [2023-11-26 10:48:24,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd34983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:24, skipping insertion in model container [2023-11-26 10:48:24,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:23" (2/3) ... [2023-11-26 10:48:24,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd34983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:24, skipping insertion in model container [2023-11-26 10:48:24,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:24" (3/3) ... [2023-11-26 10:48:24,104 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_dependencies_file-84.i [2023-11-26 10:48:24,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:24,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:24,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:24,184 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;@6d0e2988, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:24,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 44 states have internal predecessors, (66), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-26 10:48:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 10:48:24,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:24,207 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:24,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:24,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1291076765, now seen corresponding path program 1 times [2023-11-26 10:48:24,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251138249] [2023-11-26 10:48:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:24,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251138249] [2023-11-26 10:48:24,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:48:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665828171] [2023-11-26 10:48:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:24,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:24,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:24,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:48:24,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-11-26 10:48:24,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:24,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665828171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:24,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:24,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:48:24,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984678341] [2023-11-26 10:48:24,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:24,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:48:24,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:24,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:48:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:24,925 INFO L87 Difference]: Start difference. First operand has 68 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 44 states have internal predecessors, (66), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 10:48:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:24,994 INFO L93 Difference]: Finished difference Result 133 states and 240 transitions. [2023-11-26 10:48:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:48:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 138 [2023-11-26 10:48:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:25,012 INFO L225 Difference]: With dead ends: 133 [2023-11-26 10:48:25,013 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 10:48:25,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 137 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 10:48:25,034 INFO L413 NwaCegarLoop]: 102 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, 102 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 10:48:25,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 10:48:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-26 10:48:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-26 10:48:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 105 transitions. [2023-11-26 10:48:25,091 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 105 transitions. Word has length 138 [2023-11-26 10:48:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:25,092 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 105 transitions. [2023-11-26 10:48:25,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-26 10:48:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 105 transitions. [2023-11-26 10:48:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 10:48:25,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:25,096 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:25,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:48:25,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:48:25,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1656476381, now seen corresponding path program 1 times [2023-11-26 10:48:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:25,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393528347] [2023-11-26 10:48:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:25,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:25,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684077497] [2023-11-26 10:48:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:25,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:25,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:48:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:25,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:48:25,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-26 10:48:33,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:33,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:33,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393528347] [2023-11-26 10:48:33,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:33,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684077497] [2023-11-26 10:48:33,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684077497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:33,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410742852] [2023-11-26 10:48:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:33,915 INFO L87 Difference]: Start difference. First operand 66 states and 105 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:36,197 INFO L93 Difference]: Finished difference Result 179 states and 277 transitions. [2023-11-26 10:48:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:48:36,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 138 [2023-11-26 10:48:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:36,201 INFO L225 Difference]: With dead ends: 179 [2023-11-26 10:48:36,202 INFO L226 Difference]: Without dead ends: 114 [2023-11-26 10:48:36,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:36,204 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 83 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:36,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 266 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-26 10:48:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-26 10:48:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2023-11-26 10:48:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 69 states have internal predecessors, (99), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 10:48:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 151 transitions. [2023-11-26 10:48:36,229 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 151 transitions. Word has length 138 [2023-11-26 10:48:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:36,230 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 151 transitions. [2023-11-26 10:48:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 151 transitions. [2023-11-26 10:48:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 10:48:36,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:36,235 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:36,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:36,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:36,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:36,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1263449371, now seen corresponding path program 1 times [2023-11-26 10:48:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449177871] [2023-11-26 10:48:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:36,483 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195255784] [2023-11-26 10:48:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:36,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:36,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:48:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:36,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:48:36,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-26 10:48:43,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:43,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449177871] [2023-11-26 10:48:43,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195255784] [2023-11-26 10:48:43,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195255784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:43,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:43,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115244082] [2023-11-26 10:48:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:43,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:43,790 INFO L87 Difference]: Start difference. First operand 97 states and 151 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:46,249 INFO L93 Difference]: Finished difference Result 192 states and 297 transitions. [2023-11-26 10:48:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 138 [2023-11-26 10:48:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:46,252 INFO L225 Difference]: With dead ends: 192 [2023-11-26 10:48:46,253 INFO L226 Difference]: Without dead ends: 96 [2023-11-26 10:48:46,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:46,256 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 71 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:46,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 273 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 10:48:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-26 10:48:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2023-11-26 10:48:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.421875) internal successors, (91), 65 states have internal predecessors, (91), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 10:48:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 143 transitions. [2023-11-26 10:48:46,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 143 transitions. Word has length 138 [2023-11-26 10:48:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:46,277 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 143 transitions. [2023-11-26 10:48:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 143 transitions. [2023-11-26 10:48:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-26 10:48:46,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:46,281 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:46,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:46,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:46,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:46,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2133328285, now seen corresponding path program 1 times [2023-11-26 10:48:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:46,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740866340] [2023-11-26 10:48:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:46,540 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101214703] [2023-11-26 10:48:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:46,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:46,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:48:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:48:46,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-26 10:48:47,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:47,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:47,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740866340] [2023-11-26 10:48:47,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:47,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101214703] [2023-11-26 10:48:47,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101214703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:47,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:47,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:47,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535913923] [2023-11-26 10:48:47,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:47,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:47,468 INFO L87 Difference]: Start difference. First operand 93 states and 143 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:47,820 INFO L93 Difference]: Finished difference Result 238 states and 357 transitions. [2023-11-26 10:48:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:48:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 139 [2023-11-26 10:48:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:47,826 INFO L225 Difference]: With dead ends: 238 [2023-11-26 10:48:47,826 INFO L226 Difference]: Without dead ends: 146 [2023-11-26 10:48:47,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:47,829 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 60 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:47,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 331 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:48:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-26 10:48:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2023-11-26 10:48:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 96 states have internal predecessors, (132), 30 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:48:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 192 transitions. [2023-11-26 10:48:47,854 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 192 transitions. Word has length 139 [2023-11-26 10:48:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:47,855 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 192 transitions. [2023-11-26 10:48:47,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 192 transitions. [2023-11-26 10:48:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-26 10:48:47,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:47,859 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:47,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:48,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1768612001, now seen corresponding path program 1 times [2023-11-26 10:48:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264913211] [2023-11-26 10:48:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:48,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963338801] [2023-11-26 10:48:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:48,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:48,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:48:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:48:48,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-26 10:48:48,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:48,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264913211] [2023-11-26 10:48:48,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963338801] [2023-11-26 10:48:48,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963338801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:48,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:48,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991151482] [2023-11-26 10:48:48,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:48,703 INFO L87 Difference]: Start difference. First operand 128 states and 192 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:48,866 INFO L93 Difference]: Finished difference Result 248 states and 372 transitions. [2023-11-26 10:48:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:48,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 139 [2023-11-26 10:48:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:48,869 INFO L225 Difference]: With dead ends: 248 [2023-11-26 10:48:48,869 INFO L226 Difference]: Without dead ends: 128 [2023-11-26 10:48:48,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:48,871 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 60 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:48,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 282 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-26 10:48:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2023-11-26 10:48:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 92 states have internal predecessors, (124), 30 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:48:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 184 transitions. [2023-11-26 10:48:48,902 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 184 transitions. Word has length 139 [2023-11-26 10:48:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:48,903 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 184 transitions. [2023-11-26 10:48:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:48:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 184 transitions. [2023-11-26 10:48:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-26 10:48:48,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:48,911 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:48,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:49,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:49,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:49,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1903473573, now seen corresponding path program 1 times [2023-11-26 10:48:49,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:49,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709483178] [2023-11-26 10:48:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:49,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:49,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096274289] [2023-11-26 10:48:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:49,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:49,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:48:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:49,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:49,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 177 proven. 57 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2023-11-26 10:48:49,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-11-26 10:48:49,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709483178] [2023-11-26 10:48:49,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096274289] [2023-11-26 10:48:49,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096274289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:49,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:49,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 10:48:49,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086814043] [2023-11-26 10:48:49,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:49,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:48:49,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:48:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:48:49,625 INFO L87 Difference]: Start difference. First operand 124 states and 184 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-26 10:48:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:49,871 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2023-11-26 10:48:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:48:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 139 [2023-11-26 10:48:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:49,874 INFO L225 Difference]: With dead ends: 230 [2023-11-26 10:48:49,874 INFO L226 Difference]: Without dead ends: 114 [2023-11-26 10:48:49,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:48:49,876 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 85 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:49,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 102 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:48:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-26 10:48:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2023-11-26 10:48:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 79 states have internal predecessors, (101), 28 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-26 10:48:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 157 transitions. [2023-11-26 10:48:49,897 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 157 transitions. Word has length 139 [2023-11-26 10:48:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:49,898 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 157 transitions. [2023-11-26 10:48:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-26 10:48:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 157 transitions. [2023-11-26 10:48:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-26 10:48:49,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:49,900 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:49,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:50,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,107 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:50,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:50,107 INFO L85 PathProgramCache]: Analyzing trace with hash 726907648, now seen corresponding path program 1 times [2023-11-26 10:48:50,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:50,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660271173] [2023-11-26 10:48:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:50,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:50,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025813386] [2023-11-26 10:48:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:50,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:50,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:50,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 10:48:50,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 618 proven. 114 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-11-26 10:48:53,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-26 10:49:11,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660271173] [2023-11-26 10:49:11,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:11,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025813386] [2023-11-26 10:49:11,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025813386] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:11,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:49:11,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 27 [2023-11-26 10:49:11,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338754979] [2023-11-26 10:49:11,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:49:11,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:49:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:49:11,313 INFO L87 Difference]: Start difference. First operand 112 states and 157 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:49:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:17,538 INFO L93 Difference]: Finished difference Result 304 states and 430 transitions. [2023-11-26 10:49:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:49:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 140 [2023-11-26 10:49:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:17,542 INFO L225 Difference]: With dead ends: 304 [2023-11-26 10:49:17,542 INFO L226 Difference]: Without dead ends: 200 [2023-11-26 10:49:17,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:49:17,544 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 123 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:17,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 538 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-26 10:49:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-26 10:49:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2023-11-26 10:49:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.3398058252427185) internal successors, (138), 105 states have internal predecessors, (138), 28 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-26 10:49:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 194 transitions. [2023-11-26 10:49:17,593 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 194 transitions. Word has length 140 [2023-11-26 10:49:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:17,593 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 194 transitions. [2023-11-26 10:49:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-26 10:49:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 194 transitions. [2023-11-26 10:49:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-26 10:49:17,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:17,596 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:17,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:17,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:17,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:17,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 333880638, now seen corresponding path program 1 times [2023-11-26 10:49:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:17,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025874570] [2023-11-26 10:49:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:17,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:17,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194677466] [2023-11-26 10:49:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:17,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:17,855 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498e470c-d119-4fe5-9f26-bff0fc8c7757/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:49:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:17,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:49:17,975 INFO L285 TraceCheckSpWp]: Computing forward predicates...