./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya --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 2913f965e0d9fa4df5794a69da1eb9ae7e20a4f8b2461420582f4690c4751bfe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:21:28,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:21:28,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:21:28,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:21:28,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:21:28,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:21:28,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:21:28,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:21:28,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:21:28,876 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:21:28,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:21:28,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:21:28,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:21:28,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:21:28,879 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:21:28,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:21:28,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:21:28,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:21:28,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:21:28,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:21:28,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:21:28,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:21:28,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:21:28,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:21:28,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:21:28,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:21:28,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:21:28,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:21:28,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:21:28,887 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:21:28,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:21:28,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:21:28,888 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:21:28,888 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:21:28,888 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:21:28,889 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:21:28,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:21:28,889 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:21:28,889 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:21:28,889 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:21:28,890 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:21:28,890 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:21:28,890 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_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2913f965e0d9fa4df5794a69da1eb9ae7e20a4f8b2461420582f4690c4751bfe [2023-11-29 00:21:29,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:21:29,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:21:29,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:21:29,140 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:21:29,140 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:21:29,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i [2023-11-29 00:21:31,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:21:32,128 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:21:32,128 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i [2023-11-29 00:21:32,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/data/9bac280c2/06e043ae08404536b091753afdbfd658/FLAG911947e2d [2023-11-29 00:21:32,149 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/data/9bac280c2/06e043ae08404536b091753afdbfd658 [2023-11-29 00:21:32,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:21:32,153 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:21:32,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:21:32,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:21:32,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:21:32,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1114c716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32, skipping insertion in model container [2023-11-29 00:21:32,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,191 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:21:32,310 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_22c03fc3-7d33-4f99-82c8-448dfa0f39af/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i[919,932] [2023-11-29 00:21:32,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:21:32,396 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:21:32,409 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_22c03fc3-7d33-4f99-82c8-448dfa0f39af/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i[919,932] [2023-11-29 00:21:32,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:21:32,479 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:21:32,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32 WrapperNode [2023-11-29 00:21:32,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:21:32,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:21:32,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:21:32,487 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:21:32,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,557 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 258 [2023-11-29 00:21:32,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:21:32,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:21:32,559 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:21:32,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:21:32,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,595 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]. [2023-11-29 00:21:32,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,611 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,631 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:21:32,632 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:21:32,632 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:21:32,632 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:21:32,633 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (1/1) ... [2023-11-29 00:21:32,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:21:32,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:32,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:21:32,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:21:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:21:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:21:32,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:21:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:21:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:21:32,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:21:32,797 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:21:32,800 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:21:33,205 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:21:33,233 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:21:33,234 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:21:33,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:21:33 BoogieIcfgContainer [2023-11-29 00:21:33,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:21:33,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:21:33,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:21:33,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:21:33,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:21:32" (1/3) ... [2023-11-29 00:21:33,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a4208f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:21:33, skipping insertion in model container [2023-11-29 00:21:33,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:32" (2/3) ... [2023-11-29 00:21:33,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a4208f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:21:33, skipping insertion in model container [2023-11-29 00:21:33,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:21:33" (3/3) ... [2023-11-29 00:21:33,243 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-ps-ci_file-81.i [2023-11-29 00:21:33,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:21:33,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:21:33,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:21:33,317 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;@3dda83f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:21:33,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:21:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 63 states have internal predecessors, (96), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 00:21:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 00:21:33,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:33,337 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:33,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -62514583, now seen corresponding path program 1 times [2023-11-29 00:21:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119149791] [2023-11-29 00:21:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119149791] [2023-11-29 00:21:33,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:21:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969262015] [2023-11-29 00:21:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:33,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:33,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:33,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:21:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:33,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:21:33,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-29 00:21:33,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:33,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969262015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:21:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444370995] [2023-11-29 00:21:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:33,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:21:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:33,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:21:33,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:21:33,900 INFO L87 Difference]: Start difference. First operand has 96 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 63 states have internal predecessors, (96), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 00:21:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:33,943 INFO L93 Difference]: Finished difference Result 189 states and 345 transitions. [2023-11-29 00:21:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:21:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) Word has length 198 [2023-11-29 00:21:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:33,954 INFO L225 Difference]: With dead ends: 189 [2023-11-29 00:21:33,954 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 00:21:33,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:21:33,963 INFO L413 NwaCegarLoop]: 150 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, 150 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 [2023-11-29 00:21:33,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 00:21:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-29 00:21:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 00:21:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 153 transitions. [2023-11-29 00:21:34,016 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 153 transitions. Word has length 198 [2023-11-29 00:21:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:34,016 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 153 transitions. [2023-11-29 00:21:34,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 00:21:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 153 transitions. [2023-11-29 00:21:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 00:21:34,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:34,022 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:34,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:21:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:21:34,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:34,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash -810154957, now seen corresponding path program 1 times [2023-11-29 00:21:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:34,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171524238] [2023-11-29 00:21:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:34,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:34,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722259899] [2023-11-29 00:21:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:34,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:34,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:34,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:34,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:21:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:34,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:21:34,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:21:34,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:34,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171524238] [2023-11-29 00:21:34,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722259899] [2023-11-29 00:21:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722259899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:34,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:34,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:21:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388918707] [2023-11-29 00:21:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:21:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:21:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:21:34,808 INFO L87 Difference]: Start difference. First operand 94 states and 153 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:34,877 INFO L93 Difference]: Finished difference Result 266 states and 436 transitions. [2023-11-29 00:21:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:21:34,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 198 [2023-11-29 00:21:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:34,882 INFO L225 Difference]: With dead ends: 266 [2023-11-29 00:21:34,882 INFO L226 Difference]: Without dead ends: 173 [2023-11-29 00:21:34,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:21:34,885 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 40 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:34,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 281 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-29 00:21:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2023-11-29 00:21:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 94 states have (on average 1.4042553191489362) internal successors, (132), 94 states have internal predecessors, (132), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 256 transitions. [2023-11-29 00:21:34,920 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 256 transitions. Word has length 198 [2023-11-29 00:21:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:34,921 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 256 transitions. [2023-11-29 00:21:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 256 transitions. [2023-11-29 00:21:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-29 00:21:34,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:34,926 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:34,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:21:35,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 00:21:35,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:35,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash 244602596, now seen corresponding path program 1 times [2023-11-29 00:21:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:35,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695228074] [2023-11-29 00:21:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:35,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:35,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:35,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453894078] [2023-11-29 00:21:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:35,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:35,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:35,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:35,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:21:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:35,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:21:35,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:21:35,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695228074] [2023-11-29 00:21:35,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453894078] [2023-11-29 00:21:35,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453894078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:35,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:35,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:21:35,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832271056] [2023-11-29 00:21:35,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:35,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:21:35,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:35,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:21:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:35,697 INFO L87 Difference]: Start difference. First operand 159 states and 256 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:35,777 INFO L93 Difference]: Finished difference Result 269 states and 437 transitions. [2023-11-29 00:21:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:21:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-29 00:21:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:35,782 INFO L225 Difference]: With dead ends: 269 [2023-11-29 00:21:35,782 INFO L226 Difference]: Without dead ends: 173 [2023-11-29 00:21:35,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:35,785 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 38 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:35,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 419 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-29 00:21:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2023-11-29 00:21:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 94 states have (on average 1.3936170212765957) internal successors, (131), 94 states have internal predecessors, (131), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 255 transitions. [2023-11-29 00:21:35,817 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 255 transitions. Word has length 200 [2023-11-29 00:21:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:35,818 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 255 transitions. [2023-11-29 00:21:35,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 255 transitions. [2023-11-29 00:21:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 00:21:35,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:35,822 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:35,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:21:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 00:21:36,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:36,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -231426420, now seen corresponding path program 1 times [2023-11-29 00:21:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:36,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874927794] [2023-11-29 00:21:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:36,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:36,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811064525] [2023-11-29 00:21:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:36,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:36,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:21:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:36,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:21:36,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:21:36,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:36,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874927794] [2023-11-29 00:21:36,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811064525] [2023-11-29 00:21:36,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811064525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:36,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:36,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:21:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898387405] [2023-11-29 00:21:36,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:36,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:21:36,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:21:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:36,372 INFO L87 Difference]: Start difference. First operand 159 states and 255 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:36,506 INFO L93 Difference]: Finished difference Result 369 states and 592 transitions. [2023-11-29 00:21:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:21:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 00:21:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:36,510 INFO L225 Difference]: With dead ends: 369 [2023-11-29 00:21:36,511 INFO L226 Difference]: Without dead ends: 276 [2023-11-29 00:21:36,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:36,512 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 125 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:36,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 421 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:21:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-11-29 00:21:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 252. [2023-11-29 00:21:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 181 states have (on average 1.5248618784530388) internal successors, (276), 182 states have internal predecessors, (276), 66 states have call successors, (66), 4 states have call predecessors, (66), 4 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 00:21:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 408 transitions. [2023-11-29 00:21:36,545 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 408 transitions. Word has length 201 [2023-11-29 00:21:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:36,546 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 408 transitions. [2023-11-29 00:21:36,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 408 transitions. [2023-11-29 00:21:36,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 00:21:36,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:36,550 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:36,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:21:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:36,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:36,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash 448631950, now seen corresponding path program 1 times [2023-11-29 00:21:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:36,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614565385] [2023-11-29 00:21:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:36,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:36,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92374225] [2023-11-29 00:21:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:36,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:21:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:36,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:21:36,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:21:37,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:37,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:37,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614565385] [2023-11-29 00:21:37,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:37,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92374225] [2023-11-29 00:21:37,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92374225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:37,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:37,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:21:37,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538762669] [2023-11-29 00:21:37,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:37,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:21:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:21:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:37,010 INFO L87 Difference]: Start difference. First operand 252 states and 408 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:37,115 INFO L93 Difference]: Finished difference Result 464 states and 749 transitions. [2023-11-29 00:21:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:21:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-29 00:21:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:37,119 INFO L225 Difference]: With dead ends: 464 [2023-11-29 00:21:37,119 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 00:21:37,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:37,121 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 105 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:37,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 446 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:21:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 00:21:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 238. [2023-11-29 00:21:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 171 states have (on average 1.4678362573099415) internal successors, (251), 171 states have internal predecessors, (251), 62 states have call successors, (62), 4 states have call predecessors, (62), 4 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 375 transitions. [2023-11-29 00:21:37,144 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 375 transitions. Word has length 201 [2023-11-29 00:21:37,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:37,145 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 375 transitions. [2023-11-29 00:21:37,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:21:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 375 transitions. [2023-11-29 00:21:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 00:21:37,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:37,148 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:37,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:21:37,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:37,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:37,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash -624453430, now seen corresponding path program 1 times [2023-11-29 00:21:37,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129384743] [2023-11-29 00:21:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:37,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:37,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:37,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227731940] [2023-11-29 00:21:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:37,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:37,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:37,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:21:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:37,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:21:37,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 918 proven. 54 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2023-11-29 00:21:38,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:21:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129384743] [2023-11-29 00:21:38,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227731940] [2023-11-29 00:21:38,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227731940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:38,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 00:21:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299570355] [2023-11-29 00:21:38,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:21:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:21:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:21:38,394 INFO L87 Difference]: Start difference. First operand 238 states and 375 transitions. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:21:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:38,686 INFO L93 Difference]: Finished difference Result 420 states and 655 transitions. [2023-11-29 00:21:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:21:38,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) Word has length 201 [2023-11-29 00:21:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:38,691 INFO L225 Difference]: With dead ends: 420 [2023-11-29 00:21:38,691 INFO L226 Difference]: Without dead ends: 254 [2023-11-29 00:21:38,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:21:38,693 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 212 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:38,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 237 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:21:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-29 00:21:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 246. [2023-11-29 00:21:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 177 states have (on average 1.4180790960451977) internal successors, (251), 177 states have internal predecessors, (251), 62 states have call successors, (62), 6 states have call predecessors, (62), 6 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 375 transitions. [2023-11-29 00:21:38,720 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 375 transitions. Word has length 201 [2023-11-29 00:21:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:38,721 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 375 transitions. [2023-11-29 00:21:38,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:21:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 375 transitions. [2023-11-29 00:21:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 00:21:38,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:38,725 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:38,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:21:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:38,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:38,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash -405598712, now seen corresponding path program 1 times [2023-11-29 00:21:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:38,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175196764] [2023-11-29 00:21:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:38,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914336344] [2023-11-29 00:21:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:38,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:38,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:38,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:21:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:39,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:21:39,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 00:21:39,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:21:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175196764] [2023-11-29 00:21:39,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914336344] [2023-11-29 00:21:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914336344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:39,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:21:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332189127] [2023-11-29 00:21:39,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:21:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:21:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:21:39,742 INFO L87 Difference]: Start difference. First operand 246 states and 375 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-29 00:21:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:40,449 INFO L93 Difference]: Finished difference Result 545 states and 798 transitions. [2023-11-29 00:21:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:21:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) Word has length 201 [2023-11-29 00:21:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:40,453 INFO L225 Difference]: With dead ends: 545 [2023-11-29 00:21:40,453 INFO L226 Difference]: Without dead ends: 390 [2023-11-29 00:21:40,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:21:40,455 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 304 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:40,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 348 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:21:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-29 00:21:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 327. [2023-11-29 00:21:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 240 states have (on average 1.375) internal successors, (330), 241 states have internal predecessors, (330), 72 states have call successors, (72), 14 states have call predecessors, (72), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-29 00:21:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 474 transitions. [2023-11-29 00:21:40,489 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 474 transitions. Word has length 201 [2023-11-29 00:21:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:40,490 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 474 transitions. [2023-11-29 00:21:40,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-29 00:21:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 474 transitions. [2023-11-29 00:21:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 00:21:40,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:40,492 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:40,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:21:40,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:40,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:40,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1804109550, now seen corresponding path program 1 times [2023-11-29 00:21:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:40,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076582185] [2023-11-29 00:21:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:40,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:40,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657309100] [2023-11-29 00:21:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:40,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:40,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:40,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:40,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:21:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:40,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:21:40,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 918 proven. 54 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2023-11-29 00:21:41,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:21:41,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076582185] [2023-11-29 00:21:41,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:41,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657309100] [2023-11-29 00:21:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657309100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:41,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 00:21:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576713520] [2023-11-29 00:21:41,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:21:41,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:21:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:21:41,264 INFO L87 Difference]: Start difference. First operand 327 states and 474 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 3 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-29 00:21:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:41,576 INFO L93 Difference]: Finished difference Result 567 states and 824 transitions. [2023-11-29 00:21:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:21:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 3 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 202 [2023-11-29 00:21:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:41,580 INFO L225 Difference]: With dead ends: 567 [2023-11-29 00:21:41,580 INFO L226 Difference]: Without dead ends: 343 [2023-11-29 00:21:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:21:41,581 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 345 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:41,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 245 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:21:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-29 00:21:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 300. [2023-11-29 00:21:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 225 states have (on average 1.3822222222222222) internal successors, (311), 225 states have internal predecessors, (311), 62 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 435 transitions. [2023-11-29 00:21:41,612 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 435 transitions. Word has length 202 [2023-11-29 00:21:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:41,613 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 435 transitions. [2023-11-29 00:21:41,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 3 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-29 00:21:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 435 transitions. [2023-11-29 00:21:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 00:21:41,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:41,615 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:41,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:21:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:41,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:41,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -29102188, now seen corresponding path program 1 times [2023-11-29 00:21:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:41,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960976943] [2023-11-29 00:21:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:41,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789598310] [2023-11-29 00:21:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:41,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:41,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:41,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:21:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:42,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:21:42,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-29 00:21:42,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:21:42,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960976943] [2023-11-29 00:21:42,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789598310] [2023-11-29 00:21:42,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789598310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:42,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:42,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-29 00:21:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85720325] [2023-11-29 00:21:42,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:42,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:21:42,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:21:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:21:42,454 INFO L87 Difference]: Start difference. First operand 300 states and 435 transitions. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-29 00:21:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:43,098 INFO L93 Difference]: Finished difference Result 581 states and 855 transitions. [2023-11-29 00:21:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:21:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 202 [2023-11-29 00:21:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:43,101 INFO L225 Difference]: With dead ends: 581 [2023-11-29 00:21:43,101 INFO L226 Difference]: Without dead ends: 384 [2023-11-29 00:21:43,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:21:43,103 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 190 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 874 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:21:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-29 00:21:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 308. [2023-11-29 00:21:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 231 states have (on average 1.329004329004329) internal successors, (307), 231 states have internal predecessors, (307), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 431 transitions. [2023-11-29 00:21:43,138 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 431 transitions. Word has length 202 [2023-11-29 00:21:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:43,139 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 431 transitions. [2023-11-29 00:21:43,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-29 00:21:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 431 transitions. [2023-11-29 00:21:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:21:43,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:43,141 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:43,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 00:21:43,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:43,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:43,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash 797193641, now seen corresponding path program 1 times [2023-11-29 00:21:43,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:43,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598696088] [2023-11-29 00:21:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:43,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:43,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689529005] [2023-11-29 00:21:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:43,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:43,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:43,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:21:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:43,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:21:43,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 00:21:44,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:21:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598696088] [2023-11-29 00:21:44,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689529005] [2023-11-29 00:21:44,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689529005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:44,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:44,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 00:21:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549486640] [2023-11-29 00:21:44,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:21:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:21:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:21:44,703 INFO L87 Difference]: Start difference. First operand 308 states and 431 transitions. Second operand has 16 states, 15 states have (on average 6.266666666666667) internal successors, (94), 16 states have internal predecessors, (94), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:21:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:46,066 INFO L93 Difference]: Finished difference Result 749 states and 1060 transitions. [2023-11-29 00:21:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:21:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.266666666666667) internal successors, (94), 16 states have internal predecessors, (94), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 203 [2023-11-29 00:21:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:46,070 INFO L225 Difference]: With dead ends: 749 [2023-11-29 00:21:46,070 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 00:21:46,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=915, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:21:46,072 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 993 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:46,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 734 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:21:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 00:21:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 308. [2023-11-29 00:21:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 231 states have (on average 1.2943722943722944) internal successors, (299), 231 states have internal predecessors, (299), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:21:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 423 transitions. [2023-11-29 00:21:46,133 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 423 transitions. Word has length 203 [2023-11-29 00:21:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:46,134 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 423 transitions. [2023-11-29 00:21:46,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.266666666666667) internal successors, (94), 16 states have internal predecessors, (94), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:21:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 423 transitions. [2023-11-29 00:21:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:21:46,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:46,136 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:46,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:21:46,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:21:46,337 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:46,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:46,337 INFO L85 PathProgramCache]: Analyzing trace with hash -482670037, now seen corresponding path program 1 times [2023-11-29 00:21:46,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:46,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65627076] [2023-11-29 00:21:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:46,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:46,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:46,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218145211] [2023-11-29 00:21:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:46,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:46,363 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:46,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:21:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:46,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:21:46,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 00:21:55,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:22:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:03,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65627076] [2023-11-29 00:22:03,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:03,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218145211] [2023-11-29 00:22:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218145211] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:03,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:03,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2023-11-29 00:22:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641567332] [2023-11-29 00:22:03,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:22:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:22:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:22:03,874 INFO L87 Difference]: Start difference. First operand 308 states and 423 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:22:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:12,589 INFO L93 Difference]: Finished difference Result 588 states and 791 transitions. [2023-11-29 00:22:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:22:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 00:22:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:12,592 INFO L225 Difference]: With dead ends: 588 [2023-11-29 00:22:12,592 INFO L226 Difference]: Without dead ends: 387 [2023-11-29 00:22:12,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:22:12,593 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 211 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:12,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 614 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:22:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-29 00:22:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 320. [2023-11-29 00:22:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 243 states have (on average 1.2921810699588476) internal successors, (314), 243 states have internal predecessors, (314), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:22:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 438 transitions. [2023-11-29 00:22:12,642 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 438 transitions. Word has length 203 [2023-11-29 00:22:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:12,642 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 438 transitions. [2023-11-29 00:22:12,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:22:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 438 transitions. [2023-11-29 00:22:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:22:12,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:12,644 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:12,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:22:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:22:12,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:12,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:12,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1069476051, now seen corresponding path program 1 times [2023-11-29 00:22:12,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:12,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661224511] [2023-11-29 00:22:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:12,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:12,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949318241] [2023-11-29 00:22:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:12,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:12,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:12,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:12,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:22:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:13,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:22:13,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 00:22:13,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:22:14,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:14,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661224511] [2023-11-29 00:22:14,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:14,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949318241] [2023-11-29 00:22:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949318241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:14,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:22:14,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 00:22:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792680770] [2023-11-29 00:22:14,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:14,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:22:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:14,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:22:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:22:14,798 INFO L87 Difference]: Start difference. First operand 320 states and 438 transitions. Second operand has 18 states, 17 states have (on average 5.647058823529412) internal successors, (96), 18 states have internal predecessors, (96), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:22:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:16,019 INFO L93 Difference]: Finished difference Result 662 states and 903 transitions. [2023-11-29 00:22:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:22:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.647058823529412) internal successors, (96), 18 states have internal predecessors, (96), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 203 [2023-11-29 00:22:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:16,023 INFO L225 Difference]: With dead ends: 662 [2023-11-29 00:22:16,023 INFO L226 Difference]: Without dead ends: 449 [2023-11-29 00:22:16,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:22:16,025 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 486 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:16,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 692 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:22:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-29 00:22:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 370. [2023-11-29 00:22:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 293 states have (on average 1.3037542662116042) internal successors, (382), 293 states have internal predecessors, (382), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:22:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 506 transitions. [2023-11-29 00:22:16,091 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 506 transitions. Word has length 203 [2023-11-29 00:22:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:16,092 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 506 transitions. [2023-11-29 00:22:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.647058823529412) internal successors, (96), 18 states have internal predecessors, (96), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:22:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 506 transitions. [2023-11-29 00:22:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:22:16,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:16,094 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:16,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:22:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:22:16,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:16,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1735307894, now seen corresponding path program 1 times [2023-11-29 00:22:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038801082] [2023-11-29 00:22:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:16,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:16,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447383146] [2023-11-29 00:22:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:16,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:16,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:16,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:22:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:16,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:22:16,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 00:22:18,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:22:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:35,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038801082] [2023-11-29 00:22:35,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:35,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447383146] [2023-11-29 00:22:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447383146] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:35,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 24 [2023-11-29 00:22:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550929481] [2023-11-29 00:22:35,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:22:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:22:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:22:35,036 INFO L87 Difference]: Start difference. First operand 370 states and 506 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:22:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:36,728 INFO L93 Difference]: Finished difference Result 646 states and 879 transitions. [2023-11-29 00:22:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:22:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 00:22:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:36,731 INFO L225 Difference]: With dead ends: 646 [2023-11-29 00:22:36,731 INFO L226 Difference]: Without dead ends: 433 [2023-11-29 00:22:36,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:22:36,732 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 221 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:36,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 508 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-29 00:22:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 379. [2023-11-29 00:22:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 302 states have (on average 1.304635761589404) internal successors, (394), 302 states have internal predecessors, (394), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:22:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 518 transitions. [2023-11-29 00:22:36,781 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 518 transitions. Word has length 203 [2023-11-29 00:22:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:36,781 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 518 transitions. [2023-11-29 00:22:36,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:22:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 518 transitions. [2023-11-29 00:22:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:22:36,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:36,783 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:36,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:22:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:36,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:36,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -583958004, now seen corresponding path program 1 times [2023-11-29 00:22:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950832944] [2023-11-29 00:22:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:37,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:37,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350180413] [2023-11-29 00:22:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:37,011 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:37,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:22:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:37,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:22:37,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:22:37,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:37,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950832944] [2023-11-29 00:22:37,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350180413] [2023-11-29 00:22:37,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350180413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:37,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:37,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:22:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516688510] [2023-11-29 00:22:37,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:37,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:22:37,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:22:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:22:37,186 INFO L87 Difference]: Start difference. First operand 379 states and 518 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:22:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:37,321 INFO L93 Difference]: Finished difference Result 623 states and 850 transitions. [2023-11-29 00:22:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 00:22:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:37,324 INFO L225 Difference]: With dead ends: 623 [2023-11-29 00:22:37,324 INFO L226 Difference]: Without dead ends: 386 [2023-11-29 00:22:37,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:37,325 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 73 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:37,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 413 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-29 00:22:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 351. [2023-11-29 00:22:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 274 states have (on average 1.2919708029197081) internal successors, (354), 274 states have internal predecessors, (354), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:22:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 478 transitions. [2023-11-29 00:22:37,368 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 478 transitions. Word has length 203 [2023-11-29 00:22:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:37,369 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 478 transitions. [2023-11-29 00:22:37,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:22:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 478 transitions. [2023-11-29 00:22:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:22:37,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:37,370 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:37,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:37,571 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:37,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1034243316, now seen corresponding path program 1 times [2023-11-29 00:22:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:37,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075009183] [2023-11-29 00:22:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:37,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:37,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261442984] [2023-11-29 00:22:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:37,591 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:37,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:22:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:37,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:22:37,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 00:22:40,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:24:02,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075009183] [2023-11-29 00:24:02,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261442984] [2023-11-29 00:24:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261442984] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:02,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 24 [2023-11-29 00:24:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051445413] [2023-11-29 00:24:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:24:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:24:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:24:02,602 INFO L87 Difference]: Start difference. First operand 351 states and 478 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:24:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:04,203 INFO L93 Difference]: Finished difference Result 585 states and 792 transitions. [2023-11-29 00:24:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:24:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-29 00:24:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:04,206 INFO L225 Difference]: With dead ends: 585 [2023-11-29 00:24:04,206 INFO L226 Difference]: Without dead ends: 382 [2023-11-29 00:24:04,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:24:04,208 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 183 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:04,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 568 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:24:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-29 00:24:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 351. [2023-11-29 00:24:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 274 states have (on average 1.2919708029197081) internal successors, (354), 274 states have internal predecessors, (354), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:24:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 478 transitions. [2023-11-29 00:24:04,274 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 478 transitions. Word has length 203 [2023-11-29 00:24:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:04,275 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 478 transitions. [2023-11-29 00:24:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:24:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 478 transitions. [2023-11-29 00:24:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-29 00:24:04,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:04,277 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:04,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 00:24:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:24:04,478 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:04,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -846743312, now seen corresponding path program 1 times [2023-11-29 00:24:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:04,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214328029] [2023-11-29 00:24:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:04,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:04,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875164585] [2023-11-29 00:24:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:04,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:04,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:04,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:24:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:05,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:24:05,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 00:24:24,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:24:42,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:42,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214328029] [2023-11-29 00:24:42,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:42,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875164585] [2023-11-29 00:24:42,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875164585] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:42,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:42,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [17] total 27 [2023-11-29 00:24:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008221156] [2023-11-29 00:24:42,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:42,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:24:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:24:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=544, Unknown=1, NotChecked=0, Total=702 [2023-11-29 00:24:42,521 INFO L87 Difference]: Start difference. First operand 351 states and 478 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:25:00,039 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (= 0 (mod c_~var_1_8~0 256))) (.cse7 (mod (+ c_~var_1_20~0 (* 255 c_~var_1_22~0) (* c_~var_1_21~0 255)) 256)) (.cse11 (mod c_~var_1_7~0 256)) (.cse12 (mod c_~var_1_5~0 256)) (.cse18 (mod (+ c_~last_1_var_1_17~0 65535) 65536))) (let ((.cse9 (and (= .cse18 (+ c_~var_1_16~0 65536)) (<= 32768 .cse18))) (.cse10 (= .cse18 c_~var_1_16~0)) (.cse15 (forall ((v_z_1116 Int)) (or (< 255 v_z_1116) (< (div v_z_1116 .cse12) 1) (= .cse12 v_z_1116)))) (.cse13 (mod c_~last_1_var_1_7~0 256)) (.cse5 (mod c_~var_1_12~0 65536)) (.cse4 (mod c_~var_1_13~0 65536)) (.cse0 (* c_~var_1_15~0 65535)) (.cse1 (* c_~var_1_14~0 65535)) (.cse2 (mod c_~var_1_11~0 65536)) (.cse6 (or (< c_~var_1_16~0 (+ .cse11 1)) (< c_~var_1_16~0 (+ .cse12 1)))) (.cse8 (= c_~var_1_17~0 .cse7)) (.cse14 (= .cse12 0)) (.cse17 (not .cse3))) (and (or (= (mod (+ c_~var_1_13~0 .cse0 .cse1 c_~last_1_var_1_11~0) 65536) .cse2) .cse3 (< .cse4 .cse5)) (or (and .cse6 (<= 128 .cse7) (= (+ 256 c_~var_1_17~0) .cse7)) .cse8) (or .cse9 .cse10) (or (= .cse11 .cse12) (and .cse3 (<= .cse13 .cse12))) (= (mod c_~var_1_10~0 4294967296) .cse12) (or (< .cse12 c_~var_1_16~0) .cse14 (let ((.cse16 (< c_~var_1_16~0 0))) (and (or .cse9 (forall ((v_z_1120 Int)) (or (= c_~var_1_16~0 (div v_z_1120 .cse12)) (< 255 v_z_1120) (< v_z_1120 0))) .cse10) (or (and (forall ((v_z_1116 Int)) (or (< 255 v_z_1116) (< v_z_1116 0) (< c_~var_1_16~0 (+ (div v_z_1116 .cse12) 1)) (= .cse12 v_z_1116))) (or .cse15 .cse16)) .cse17) (or (forall ((v_z_1102 Int)) (or (= c_~var_1_16~0 (div v_z_1102 .cse12)) (< v_z_1102 0) (< 255 v_z_1102))) .cse9 (< 254 c_~var_1_16~0) .cse10) (or (forall ((v_z_1120 Int)) (or (= c_~var_1_16~0 (div v_z_1120 .cse12)) (< 255 v_z_1120) (< v_z_1120 0) (= .cse12 v_z_1120))) .cse17) (or (and (forall ((v_z_1118 Int)) (or (< 255 v_z_1118) (< v_z_1118 0) (< c_~var_1_16~0 (+ (div v_z_1118 .cse12) 1)))) (or (forall ((v_z_1118 Int)) (or (< 255 v_z_1118) (< (div v_z_1118 .cse12) 1))) .cse16)) .cse10) (or (forall ((v_z_1102 Int)) (or (= c_~var_1_16~0 (div v_z_1102 .cse12)) (= .cse12 v_z_1102) (< v_z_1102 0) (< 255 v_z_1102))) (= c_~var_1_16~0 .cse12) .cse17)))) (or .cse14 (and (or (and (forall ((v_z_1116 Int)) (or (< 255 v_z_1116) (< .cse12 (+ (div v_z_1116 .cse12) 1)) (< v_z_1116 0) (= .cse12 v_z_1116))) .cse15) .cse17) (or (and (forall ((v_z_1120 Int)) (or (< .cse12 (+ (div v_z_1120 .cse12) 1)) (< 255 v_z_1120) (< v_z_1120 0) (= .cse12 v_z_1120))) (forall ((v_z_1120 Int)) (or (< 255 v_z_1120) (< v_z_1120 0) (= .cse12 v_z_1120)))) .cse17) (or .cse17 (and (forall ((v_z_1102 Int)) (or (< .cse12 (+ (div v_z_1102 .cse12) 2)) (= .cse12 v_z_1102) (< v_z_1102 0) (< 255 v_z_1102))) (forall ((v_z_1102 Int)) (or (= .cse12 v_z_1102) (< v_z_1102 0) (< 255 v_z_1102))))))) (or (= .cse11 (mod c_~var_1_6~0 256)) (< .cse12 .cse13) .cse17) (= .cse12 (mod c_~var_1_1~0 256)) (or .cse3 (< .cse5 (+ .cse4 1)) (= (mod (+ c_~var_1_12~0 .cse0 .cse1 c_~last_1_var_1_11~0) 65536) .cse2)) (or (and .cse6 (<= .cse7 127)) (not .cse8)) (or .cse14 .cse17)))) is different from false [2023-11-29 00:25:04,811 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (= 0 (mod c_~var_1_8~0 256))) (.cse0 (mod c_~var_1_5~0 256)) (.cse13 (mod (+ c_~last_1_var_1_17~0 65535) 65536))) (let ((.cse2 (and (= .cse13 (+ c_~var_1_16~0 65536)) (<= 32768 .cse13))) (.cse3 (= .cse13 c_~var_1_16~0)) (.cse4 (forall ((v_z_1116 Int)) (or (< 255 v_z_1116) (< (div v_z_1116 .cse0) 1) (= .cse0 v_z_1116)))) (.cse1 (= .cse0 0)) (.cse6 (not .cse11))) (and |c_ULTIMATE.start_property_#t~short26#1| (or (< .cse0 c_~var_1_16~0) .cse1 (let ((.cse5 (< c_~var_1_16~0 0))) (and (or .cse2 (forall ((v_z_1120 Int)) (or (= c_~var_1_16~0 (div v_z_1120 .cse0)) (< 255 v_z_1120) (< v_z_1120 0))) .cse3) (or (and (forall ((v_z_1116 Int)) (or (< 255 v_z_1116) (< v_z_1116 0) (< c_~var_1_16~0 (+ (div v_z_1116 .cse0) 1)) (= .cse0 v_z_1116))) (or .cse4 .cse5)) .cse6) (or (forall ((v_z_1102 Int)) (or (= c_~var_1_16~0 (div v_z_1102 .cse0)) (< v_z_1102 0) (< 255 v_z_1102))) .cse2 (< 254 c_~var_1_16~0) .cse3) (or (forall ((v_z_1120 Int)) (or (= c_~var_1_16~0 (div v_z_1120 .cse0)) (< 255 v_z_1120) (< v_z_1120 0) (= .cse0 v_z_1120))) .cse6) (or (and (forall ((v_z_1118 Int)) (or (< 255 v_z_1118) (< v_z_1118 0) (< c_~var_1_16~0 (+ (div v_z_1118 .cse0) 1)))) (or (forall ((v_z_1118 Int)) (or (< 255 v_z_1118) (< (div v_z_1118 .cse0) 1))) .cse5)) .cse3) (or (forall ((v_z_1102 Int)) (or (= c_~var_1_16~0 (div v_z_1102 .cse0)) (= .cse0 v_z_1102) (< v_z_1102 0) (< 255 v_z_1102))) (= c_~var_1_16~0 .cse0) .cse6)))) (let ((.cse7 (mod c_~var_1_7~0 256))) (or (= .cse7 0) (let ((.cse9 (mod (+ c_~var_1_20~0 (* 255 c_~var_1_22~0) (* c_~var_1_21~0 255)) 256))) (let ((.cse12 (mod c_~last_1_var_1_7~0 256)) (.cse8 (or (< c_~var_1_16~0 (+ .cse7 1)) (< c_~var_1_16~0 (+ .cse0 1)))) (.cse10 (= c_~var_1_17~0 .cse9))) (and (or (and .cse8 (<= 128 .cse9) (= (+ 256 c_~var_1_17~0) .cse9)) .cse10) (or .cse2 .cse3) (or (= .cse7 .cse0) (and .cse11 (<= .cse12 .cse0))) (or (= .cse7 (mod c_~var_1_6~0 256)) (< .cse0 .cse12) .cse6) (= .cse0 (mod c_~var_1_1~0 256)) (or (and .cse8 (<= .cse9 127)) (not .cse10))))))) (or .cse1 (and (or (and (forall ((v_z_1116 Int)) (or (< 255 v_z_1116) (< .cse0 (+ (div v_z_1116 .cse0) 1)) (< v_z_1116 0) (= .cse0 v_z_1116))) .cse4) .cse6) (or (and (forall ((v_z_1120 Int)) (or (< .cse0 (+ (div v_z_1120 .cse0) 1)) (< 255 v_z_1120) (< v_z_1120 0) (= .cse0 v_z_1120))) (forall ((v_z_1120 Int)) (or (< 255 v_z_1120) (< v_z_1120 0) (= .cse0 v_z_1120)))) .cse6) (or .cse6 (and (forall ((v_z_1102 Int)) (or (< .cse0 (+ (div v_z_1102 .cse0) 2)) (= .cse0 v_z_1102) (< v_z_1102 0) (< 255 v_z_1102))) (forall ((v_z_1102 Int)) (or (= .cse0 v_z_1102) (< v_z_1102 0) (< 255 v_z_1102))))))) (or .cse1 .cse6)))) is different from false [2023-11-29 00:25:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:08,970 INFO L93 Difference]: Finished difference Result 609 states and 816 transitions. [2023-11-29 00:25:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:25:08,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-29 00:25:08,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:08,974 INFO L225 Difference]: With dead ends: 609 [2023-11-29 00:25:08,974 INFO L226 Difference]: Without dead ends: 406 [2023-11-29 00:25:08,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=259, Invalid=936, Unknown=3, NotChecked=134, Total=1332 [2023-11-29 00:25:08,975 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 133 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:08,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 897 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 419 Invalid, 0 Unknown, 31 Unchecked, 3.6s Time] [2023-11-29 00:25:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-29 00:25:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 351. [2023-11-29 00:25:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 274 states have (on average 1.2919708029197081) internal successors, (354), 274 states have internal predecessors, (354), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:25:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 478 transitions. [2023-11-29 00:25:09,018 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 478 transitions. Word has length 204 [2023-11-29 00:25:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:09,019 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 478 transitions. [2023-11-29 00:25:09,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:25:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 478 transitions. [2023-11-29 00:25:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-29 00:25:09,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:09,020 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:09,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:25:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:25:09,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:09,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash -921185798, now seen corresponding path program 1 times [2023-11-29 00:25:09,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:09,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120609631] [2023-11-29 00:25:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:09,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:09,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308762816] [2023-11-29 00:25:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:09,244 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:09,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:25:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:09,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:25:09,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 00:25:10,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-29 00:25:10,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120609631] [2023-11-29 00:25:10,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:25:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308762816] [2023-11-29 00:25:10,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308762816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:10,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:25:10,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 00:25:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165985856] [2023-11-29 00:25:10,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:10,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:25:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:25:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:25:10,669 INFO L87 Difference]: Start difference. First operand 351 states and 478 transitions. Second operand has 15 states, 14 states have (on average 6.785714285714286) internal successors, (95), 15 states have internal predecessors, (95), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:25:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:12,306 INFO L93 Difference]: Finished difference Result 661 states and 877 transitions. [2023-11-29 00:25:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:25:12,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.785714285714286) internal successors, (95), 15 states have internal predecessors, (95), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 204 [2023-11-29 00:25:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:12,309 INFO L225 Difference]: With dead ends: 661 [2023-11-29 00:25:12,309 INFO L226 Difference]: Without dead ends: 453 [2023-11-29 00:25:12,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 395 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:25:12,311 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 624 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:12,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 842 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:25:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-29 00:25:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2023-11-29 00:25:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 268 states have (on average 1.294776119402985) internal successors, (347), 268 states have internal predecessors, (347), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:25:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 471 transitions. [2023-11-29 00:25:12,358 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 471 transitions. Word has length 204 [2023-11-29 00:25:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:12,358 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 471 transitions. [2023-11-29 00:25:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.785714285714286) internal successors, (95), 15 states have internal predecessors, (95), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-29 00:25:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 471 transitions. [2023-11-29 00:25:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-29 00:25:12,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:12,360 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:12,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:25:12,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:25:12,561 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:12,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1942254152, now seen corresponding path program 1 times [2023-11-29 00:25:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918216216] [2023-11-29 00:25:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:12,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:12,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694435348] [2023-11-29 00:25:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:12,588 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:12,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:25:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:12,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:25:12,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 00:25:23,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:25:29,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918216216] [2023-11-29 00:25:29,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:25:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694435348] [2023-11-29 00:25:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694435348] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:29,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:25:29,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 00:25:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026263078] [2023-11-29 00:25:29,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:29,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:25:29,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:25:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:25:29,787 INFO L87 Difference]: Start difference. First operand 345 states and 471 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:25:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:31,767 INFO L93 Difference]: Finished difference Result 606 states and 814 transitions. [2023-11-29 00:25:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:25:31,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-29 00:25:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:31,770 INFO L225 Difference]: With dead ends: 606 [2023-11-29 00:25:31,770 INFO L226 Difference]: Without dead ends: 403 [2023-11-29 00:25:31,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:25:31,771 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 169 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:31,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 721 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:25:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-11-29 00:25:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 351. [2023-11-29 00:25:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 274 states have (on average 1.2919708029197081) internal successors, (354), 274 states have internal predecessors, (354), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:25:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 478 transitions. [2023-11-29 00:25:31,816 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 478 transitions. Word has length 204 [2023-11-29 00:25:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:31,817 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 478 transitions. [2023-11-29 00:25:31,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:25:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 478 transitions. [2023-11-29 00:25:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-29 00:25:31,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:31,818 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:31,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:32,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:25:32,019 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:32,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1684088714, now seen corresponding path program 1 times [2023-11-29 00:25:32,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:32,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575814450] [2023-11-29 00:25:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:32,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:32,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862950887] [2023-11-29 00:25:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:32,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:32,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:32,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:25:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:32,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:25:32,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 00:25:42,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:25:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575814450] [2023-11-29 00:25:48,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:25:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862950887] [2023-11-29 00:25:48,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862950887] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:48,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:25:48,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 00:25:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258899365] [2023-11-29 00:25:48,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:25:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:25:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:25:48,517 INFO L87 Difference]: Start difference. First operand 351 states and 478 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:25:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:50,506 INFO L93 Difference]: Finished difference Result 612 states and 820 transitions. [2023-11-29 00:25:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:25:50,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-29 00:25:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:50,509 INFO L225 Difference]: With dead ends: 612 [2023-11-29 00:25:50,509 INFO L226 Difference]: Without dead ends: 403 [2023-11-29 00:25:50,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:25:50,511 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 109 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:50,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 827 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:25:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-11-29 00:25:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 348. [2023-11-29 00:25:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 271 states have (on average 1.2915129151291513) internal successors, (350), 271 states have internal predecessors, (350), 62 states have call successors, (62), 14 states have call predecessors, (62), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:25:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 474 transitions. [2023-11-29 00:25:50,556 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 474 transitions. Word has length 204 [2023-11-29 00:25:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:50,556 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 474 transitions. [2023-11-29 00:25:50,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:25:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 474 transitions. [2023-11-29 00:25:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-29 00:25:50,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:50,558 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:50,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:50,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:50,758 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:50,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:50,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1680609201, now seen corresponding path program 1 times [2023-11-29 00:25:50,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:50,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691611871] [2023-11-29 00:25:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:50,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:50,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:50,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264432963] [2023-11-29 00:25:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:50,791 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:50,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:25:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:50,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:25:50,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:29:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 00:29:07,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:29:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:29:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691611871] [2023-11-29 00:29:07,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:29:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264432963] [2023-11-29 00:29:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264432963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:29:07,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:29:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:29:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132361150] [2023-11-29 00:29:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:29:07,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:29:07,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:29:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:29:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:29:07,643 INFO L87 Difference]: Start difference. First operand 348 states and 474 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:29:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:29:08,046 INFO L93 Difference]: Finished difference Result 390 states and 520 transitions. [2023-11-29 00:29:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:29:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 205 [2023-11-29 00:29:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:29:08,050 INFO L225 Difference]: With dead ends: 390 [2023-11-29 00:29:08,050 INFO L226 Difference]: Without dead ends: 388 [2023-11-29 00:29:08,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:29:08,052 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 98 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:29:08,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 730 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:29:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-29 00:29:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 355. [2023-11-29 00:29:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 277 states have (on average 1.2851985559566788) internal successors, (356), 277 states have internal predecessors, (356), 62 states have call successors, (62), 15 states have call predecessors, (62), 15 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 00:29:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 480 transitions. [2023-11-29 00:29:08,121 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 480 transitions. Word has length 205 [2023-11-29 00:29:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:29:08,121 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 480 transitions. [2023-11-29 00:29:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-29 00:29:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 480 transitions. [2023-11-29 00:29:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-29 00:29:08,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:29:08,122 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:29:08,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:29:08,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:29:08,323 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:29:08,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:29:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2143050792, now seen corresponding path program 1 times [2023-11-29 00:29:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:29:08,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268993512] [2023-11-29 00:29:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:29:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:29:08,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:29:08,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114864594] [2023-11-29 00:29:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:29:08,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:29:08,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:29:08,350 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:29:08,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c03fc3-7d33-4f99-82c8-448dfa0f39af/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:29:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:29:08,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:29:08,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:30:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-29 00:30:54,269 INFO L327 TraceCheckSpWp]: Computing backward predicates...