./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:11,931 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:12,073 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:12,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:12,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:12,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:12,124 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:12,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:12,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:12,135 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:12,135 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:12,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:12,137 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:12,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:12,139 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:12,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:12,140 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:12,140 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:12,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:12,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:12,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:12,142 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:12,142 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:12,143 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:12,143 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:12,144 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:12,145 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:12,145 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:12,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:12,173 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:12,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:12,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:12,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:12,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:12,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:12,175 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:12,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:12,175 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:12,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:12,176 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:12,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:12,178 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:12,179 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_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2023-11-26 10:47:12,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:12,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:12,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:12,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:12,693 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:12,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-11-26 10:47:15,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:16,069 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:16,070 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-11-26 10:47:16,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data/d28e2e2c2/1c37de7080574ea88335fd7230a97724/FLAG585bfd7eb [2023-11-26 10:47:16,104 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data/d28e2e2c2/1c37de7080574ea88335fd7230a97724 [2023-11-26 10:47:16,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:16,116 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:16,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:16,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:16,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:16,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552b51cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16, skipping insertion in model container [2023-11-26 10:47:16,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,171 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:16,333 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_7fcbaf1a-f784-4076-af7a-9b9e28534950/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-11-26 10:47:16,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:16,405 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:16,417 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_7fcbaf1a-f784-4076-af7a-9b9e28534950/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-11-26 10:47:16,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:16,465 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:16,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16 WrapperNode [2023-11-26 10:47:16,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:16,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:16,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:16,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:16,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,506 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-26 10:47:16,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:16,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:16,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:16,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:16,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,536 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:47:16,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:16,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:16,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:16,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:16,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (1/1) ... [2023-11-26 10:47:16,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:16,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:16,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-26 10:47:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-26 10:47:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-26 10:47:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-26 10:47:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:47:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:47:16,758 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:16,761 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:17,167 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:17,195 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:17,195 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:47:17,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:17 BoogieIcfgContainer [2023-11-26 10:47:17,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:17,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:17,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:17,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:17,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:16" (1/3) ... [2023-11-26 10:47:17,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cca501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:17, skipping insertion in model container [2023-11-26 10:47:17,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:16" (2/3) ... [2023-11-26 10:47:17,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cca501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:17, skipping insertion in model container [2023-11-26 10:47:17,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:17" (3/3) ... [2023-11-26 10:47:17,213 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-11-26 10:47:17,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:17,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:47:17,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:17,300 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;@6b39f9f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:17,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:47:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 54 states have internal predecessors, (86), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:47:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 10:47:17,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:17,315 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:17,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:17,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1385240108, now seen corresponding path program 1 times [2023-11-26 10:47:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:17,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823656124] [2023-11-26 10:47:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:17,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:17,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:18,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:18,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823656124] [2023-11-26 10:47:18,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823656124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659825541] [2023-11-26 10:47:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:18,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:18,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:18,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 10:47:18,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:47:18,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659825541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:18,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:18,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2023-11-26 10:47:18,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726828397] [2023-11-26 10:47:18,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:47:18,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:47:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:47:18,692 INFO L87 Difference]: Start difference. First operand has 66 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 54 states have internal predecessors, (86), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:47:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:19,423 INFO L93 Difference]: Finished difference Result 176 states and 291 transitions. [2023-11-26 10:47:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:47:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-11-26 10:47:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:19,446 INFO L225 Difference]: With dead ends: 176 [2023-11-26 10:47:19,446 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 10:47:19,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:47:19,463 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 57 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:19,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 997 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:47:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 10:47:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2023-11-26 10:47:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 64 states have internal predecessors, (88), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-26 10:47:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2023-11-26 10:47:19,529 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 31 [2023-11-26 10:47:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2023-11-26 10:47:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:47:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2023-11-26 10:47:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:47:19,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:19,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:19,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:19,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:47:19,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:19,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash 787561987, now seen corresponding path program 1 times [2023-11-26 10:47:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:19,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698771247] [2023-11-26 10:47:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:19,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:19,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:20,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:20,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698771247] [2023-11-26 10:47:20,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698771247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:20,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:20,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:47:20,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250532171] [2023-11-26 10:47:20,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:20,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:20,025 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:20,128 INFO L93 Difference]: Finished difference Result 142 states and 198 transitions. [2023-11-26 10:47:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:47:20,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-26 10:47:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:20,137 INFO L225 Difference]: With dead ends: 142 [2023-11-26 10:47:20,137 INFO L226 Difference]: Without dead ends: 100 [2023-11-26 10:47:20,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:20,140 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 15 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:20,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 581 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-26 10:47:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2023-11-26 10:47:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 69 states have internal predecessors, (93), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-26 10:47:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2023-11-26 10:47:20,175 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 35 [2023-11-26 10:47:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:20,176 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2023-11-26 10:47:20,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2023-11-26 10:47:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:20,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:20,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:20,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:20,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:20,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1427170157, now seen corresponding path program 1 times [2023-11-26 10:47:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:20,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082721770] [2023-11-26 10:47:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:47:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:20,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082721770] [2023-11-26 10:47:20,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082721770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:20,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:20,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:47:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225730790] [2023-11-26 10:47:20,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:20,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:47:20,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:47:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:20,482 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:20,638 INFO L93 Difference]: Finished difference Result 156 states and 220 transitions. [2023-11-26 10:47:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:20,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-26 10:47:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:20,641 INFO L225 Difference]: With dead ends: 156 [2023-11-26 10:47:20,642 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 10:47:20,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:47:20,646 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 79 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:20,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 661 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 10:47:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2023-11-26 10:47:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 92 states have (on average 1.4130434782608696) internal successors, (130), 94 states have internal predecessors, (130), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2023-11-26 10:47:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 163 transitions. [2023-11-26 10:47:20,682 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 163 transitions. Word has length 38 [2023-11-26 10:47:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:20,682 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 163 transitions. [2023-11-26 10:47:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 163 transitions. [2023-11-26 10:47:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:20,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:20,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:20,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:47:20,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:20,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1378830067, now seen corresponding path program 1 times [2023-11-26 10:47:20,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:20,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268384983] [2023-11-26 10:47:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:20,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:47:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 10:47:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:21,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268384983] [2023-11-26 10:47:21,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268384983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:21,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:21,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:47:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277143937] [2023-11-26 10:47:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:47:21,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:47:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:21,009 INFO L87 Difference]: Start difference. First operand 115 states and 163 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:47:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:21,185 INFO L93 Difference]: Finished difference Result 171 states and 243 transitions. [2023-11-26 10:47:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:47:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2023-11-26 10:47:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:21,188 INFO L225 Difference]: With dead ends: 171 [2023-11-26 10:47:21,188 INFO L226 Difference]: Without dead ends: 160 [2023-11-26 10:47:21,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:47:21,190 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 78 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:21,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1022 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-26 10:47:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2023-11-26 10:47:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.4) internal successors, (133), 98 states have internal predecessors, (133), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2023-11-26 10:47:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2023-11-26 10:47:21,214 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 38 [2023-11-26 10:47:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:21,215 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2023-11-26 10:47:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:47:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2023-11-26 10:47:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:21,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:21,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:21,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:47:21,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:21,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1034143147, now seen corresponding path program 1 times [2023-11-26 10:47:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:21,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638034609] [2023-11-26 10:47:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:21,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:47:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638034609] [2023-11-26 10:47:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638034609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38661405] [2023-11-26 10:47:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:21,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:21,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 10:47:21,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:47:21,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38661405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:21,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 16 [2023-11-26 10:47:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859546674] [2023-11-26 10:47:21,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:47:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:47:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:47:21,726 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-26 10:47:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:22,119 INFO L93 Difference]: Finished difference Result 221 states and 315 transitions. [2023-11-26 10:47:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:47:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 38 [2023-11-26 10:47:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:22,125 INFO L225 Difference]: With dead ends: 221 [2023-11-26 10:47:22,125 INFO L226 Difference]: Without dead ends: 160 [2023-11-26 10:47:22,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:47:22,126 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 51 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:22,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 848 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:47:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-26 10:47:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2023-11-26 10:47:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 100 states have internal predecessors, (136), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2023-11-26 10:47:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 173 transitions. [2023-11-26 10:47:22,153 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 173 transitions. Word has length 38 [2023-11-26 10:47:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:22,154 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 173 transitions. [2023-11-26 10:47:22,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-26 10:47:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 173 transitions. [2023-11-26 10:47:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:22,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:22,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:22,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:22,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:22,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:22,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 985803057, now seen corresponding path program 1 times [2023-11-26 10:47:22,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:22,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880473304] [2023-11-26 10:47:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:22,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:47:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 10:47:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:22,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:22,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880473304] [2023-11-26 10:47:22,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880473304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:22,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:22,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-26 10:47:22,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56315127] [2023-11-26 10:47:22,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:22,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:47:22,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:47:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:47:22,731 INFO L87 Difference]: Start difference. First operand 124 states and 173 transitions. Second operand has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:47:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,014 INFO L93 Difference]: Finished difference Result 177 states and 245 transitions. [2023-11-26 10:47:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:47:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2023-11-26 10:47:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,016 INFO L225 Difference]: With dead ends: 177 [2023-11-26 10:47:23,017 INFO L226 Difference]: Without dead ends: 169 [2023-11-26 10:47:23,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:47:23,018 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 55 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1159 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-26 10:47:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2023-11-26 10:47:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 102 states have (on average 1.3725490196078431) internal successors, (140), 103 states have internal predecessors, (140), 17 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-26 10:47:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2023-11-26 10:47:23,036 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 38 [2023-11-26 10:47:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,036 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2023-11-26 10:47:23,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:47:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2023-11-26 10:47:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:47:23,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:47:23,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 566635317, now seen corresponding path program 1 times [2023-11-26 10:47:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034914913] [2023-11-26 10:47:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:47:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 10:47:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-26 10:47:23,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034914913] [2023-11-26 10:47:23,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034914913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:23,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:23,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:23,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893086521] [2023-11-26 10:47:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:23,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:23,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:23,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:23,168 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 10:47:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,215 INFO L93 Difference]: Finished difference Result 137 states and 186 transitions. [2023-11-26 10:47:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:23,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2023-11-26 10:47:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,217 INFO L225 Difference]: With dead ends: 137 [2023-11-26 10:47:23,217 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 10:47:23,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:23,219 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 436 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 10:47:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-26 10:47:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 99 states have internal predecessors, (134), 15 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-26 10:47:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2023-11-26 10:47:23,232 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 40 [2023-11-26 10:47:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,235 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2023-11-26 10:47:23,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 10:47:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2023-11-26 10:47:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:47:23,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:23,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:47:23,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2049570930, now seen corresponding path program 2 times [2023-11-26 10:47:23,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106073803] [2023-11-26 10:47:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:47:23,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106073803] [2023-11-26 10:47:23,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106073803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462658976] [2023-11-26 10:47:23,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:23,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:23,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:23,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:47:23,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:47:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:23,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:47:23,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:47:23,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462658976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:23,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:23,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2023-11-26 10:47:23,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77216691] [2023-11-26 10:47:23,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:47:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:47:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:47:23,710 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:24,075 INFO L93 Difference]: Finished difference Result 241 states and 334 transitions. [2023-11-26 10:47:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:47:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-26 10:47:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:24,078 INFO L225 Difference]: With dead ends: 241 [2023-11-26 10:47:24,079 INFO L226 Difference]: Without dead ends: 192 [2023-11-26 10:47:24,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:47:24,080 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 137 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:24,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1258 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:47:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-26 10:47:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 161. [2023-11-26 10:47:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 129 states have (on average 1.37984496124031) internal successors, (178), 132 states have internal predecessors, (178), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (25), 18 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-26 10:47:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 222 transitions. [2023-11-26 10:47:24,092 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 222 transitions. Word has length 39 [2023-11-26 10:47:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:24,095 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 222 transitions. [2023-11-26 10:47:24,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 222 transitions. [2023-11-26 10:47:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:47:24,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:24,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:24,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 10:47:24,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:24,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:24,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1656543920, now seen corresponding path program 1 times [2023-11-26 10:47:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:24,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865210881] [2023-11-26 10:47:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:24,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:47:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865210881] [2023-11-26 10:47:24,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865210881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:24,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:24,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 10:47:24,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968467252] [2023-11-26 10:47:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:24,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:47:24,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:24,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:47:24,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:47:24,862 INFO L87 Difference]: Start difference. First operand 161 states and 222 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:25,370 INFO L93 Difference]: Finished difference Result 182 states and 247 transitions. [2023-11-26 10:47:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:47:25,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-26 10:47:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:25,372 INFO L225 Difference]: With dead ends: 182 [2023-11-26 10:47:25,373 INFO L226 Difference]: Without dead ends: 180 [2023-11-26 10:47:25,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:47:25,374 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 129 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:25,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1089 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:47:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-26 10:47:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2023-11-26 10:47:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 132 states have (on average 1.371212121212121) internal successors, (181), 135 states have internal predecessors, (181), 19 states have call successors, (19), 11 states have call predecessors, (19), 13 states have return successors, (25), 18 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-26 10:47:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 225 transitions. [2023-11-26 10:47:25,391 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 225 transitions. Word has length 39 [2023-11-26 10:47:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:25,391 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-26 10:47:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 225 transitions. [2023-11-26 10:47:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 10:47:25,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:25,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:25,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:47:25,393 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:25,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash -190658464, now seen corresponding path program 1 times [2023-11-26 10:47:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:25,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874573513] [2023-11-26 10:47:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 10:47:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 10:47:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:25,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:25,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874573513] [2023-11-26 10:47:25,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874573513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:25,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209546294] [2023-11-26 10:47:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:25,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:25,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:47:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:47:25,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:25,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:26,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209546294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:26,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:26,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-11-26 10:47:26,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569260121] [2023-11-26 10:47:26,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:26,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 10:47:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 10:47:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-11-26 10:47:26,448 INFO L87 Difference]: Start difference. First operand 165 states and 225 transitions. Second operand has 32 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-26 10:47:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:28,556 INFO L93 Difference]: Finished difference Result 356 states and 511 transitions. [2023-11-26 10:47:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-26 10:47:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2023-11-26 10:47:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:28,560 INFO L225 Difference]: With dead ends: 356 [2023-11-26 10:47:28,560 INFO L226 Difference]: Without dead ends: 332 [2023-11-26 10:47:28,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-11-26 10:47:28,564 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 310 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:28,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 3329 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:47:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-26 10:47:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 200. [2023-11-26 10:47:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 159 states have (on average 1.3584905660377358) internal successors, (216), 166 states have internal predecessors, (216), 23 states have call successors, (23), 10 states have call predecessors, (23), 17 states have return successors, (40), 23 states have call predecessors, (40), 22 states have call successors, (40) [2023-11-26 10:47:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 279 transitions. [2023-11-26 10:47:28,607 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 279 transitions. Word has length 42 [2023-11-26 10:47:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:28,607 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 279 transitions. [2023-11-26 10:47:28,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-26 10:47:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 279 transitions. [2023-11-26 10:47:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 10:47:28,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:28,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:28,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:28,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:47:28,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:28,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1870508004, now seen corresponding path program 2 times [2023-11-26 10:47:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:28,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713136691] [2023-11-26 10:47:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 10:47:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:29,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 10:47:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713136691] [2023-11-26 10:47:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713136691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085878979] [2023-11-26 10:47:29,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:29,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:29,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:29,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:47:29,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:29,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:29,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:47:29,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:29,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:29,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085878979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:29,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:29,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-11-26 10:47:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839564897] [2023-11-26 10:47:29,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 10:47:29,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 10:47:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-11-26 10:47:29,985 INFO L87 Difference]: Start difference. First operand 200 states and 279 transitions. Second operand has 32 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 25 states have internal predecessors, (44), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-26 10:47:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:31,903 INFO L93 Difference]: Finished difference Result 405 states and 627 transitions. [2023-11-26 10:47:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-26 10:47:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 25 states have internal predecessors, (44), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 42 [2023-11-26 10:47:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:31,909 INFO L225 Difference]: With dead ends: 405 [2023-11-26 10:47:31,910 INFO L226 Difference]: Without dead ends: 390 [2023-11-26 10:47:31,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-11-26 10:47:31,916 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 436 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:31,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 2507 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:47:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-26 10:47:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 220. [2023-11-26 10:47:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 170 states have (on average 1.3352941176470587) internal successors, (227), 179 states have internal predecessors, (227), 29 states have call successors, (29), 11 states have call predecessors, (29), 20 states have return successors, (65), 29 states have call predecessors, (65), 28 states have call successors, (65) [2023-11-26 10:47:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 321 transitions. [2023-11-26 10:47:31,992 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 321 transitions. Word has length 42 [2023-11-26 10:47:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:31,993 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 321 transitions. [2023-11-26 10:47:31,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 25 states have internal predecessors, (44), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-26 10:47:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 321 transitions. [2023-11-26 10:47:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:47:31,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:31,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:32,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:47:32,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:32,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 565471912, now seen corresponding path program 1 times [2023-11-26 10:47:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:32,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017654750] [2023-11-26 10:47:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:32,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 10:47:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 10:47:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:32,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017654750] [2023-11-26 10:47:32,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017654750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:32,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790888655] [2023-11-26 10:47:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:32,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:32,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:32,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:32,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:47:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:32,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 10:47:32,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:32,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:32,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790888655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:32,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:32,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-11-26 10:47:32,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14755877] [2023-11-26 10:47:32,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:32,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:47:32,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:32,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:47:32,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:47:32,876 INFO L87 Difference]: Start difference. First operand 220 states and 321 transitions. Second operand has 21 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-26 10:47:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:33,590 INFO L93 Difference]: Finished difference Result 416 states and 650 transitions. [2023-11-26 10:47:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 10:47:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 44 [2023-11-26 10:47:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:33,594 INFO L225 Difference]: With dead ends: 416 [2023-11-26 10:47:33,595 INFO L226 Difference]: Without dead ends: 393 [2023-11-26 10:47:33,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:47:33,597 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 253 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1733 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:47:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-26 10:47:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 228. [2023-11-26 10:47:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 174 states have (on average 1.3160919540229885) internal successors, (229), 184 states have internal predecessors, (229), 32 states have call successors, (32), 11 states have call predecessors, (32), 21 states have return successors, (82), 32 states have call predecessors, (82), 31 states have call successors, (82) [2023-11-26 10:47:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 343 transitions. [2023-11-26 10:47:33,635 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 343 transitions. Word has length 44 [2023-11-26 10:47:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:33,636 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 343 transitions. [2023-11-26 10:47:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-26 10:47:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 343 transitions. [2023-11-26 10:47:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 10:47:33,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:33,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:33,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:33,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:47:33,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:33,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1795453191, now seen corresponding path program 1 times [2023-11-26 10:47:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:33,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163040936] [2023-11-26 10:47:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 10:47:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 10:47:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:33,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163040936] [2023-11-26 10:47:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163040936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:33,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840795787] [2023-11-26 10:47:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:33,914 INFO L87 Difference]: Start difference. First operand 228 states and 343 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:47:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:33,969 INFO L93 Difference]: Finished difference Result 449 states and 674 transitions. [2023-11-26 10:47:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-11-26 10:47:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:33,972 INFO L225 Difference]: With dead ends: 449 [2023-11-26 10:47:33,973 INFO L226 Difference]: Without dead ends: 239 [2023-11-26 10:47:33,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:33,975 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:33,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 147 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-26 10:47:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2023-11-26 10:47:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 177 states have (on average 1.3163841807909604) internal successors, (233), 187 states have internal predecessors, (233), 32 states have call successors, (32), 11 states have call predecessors, (32), 21 states have return successors, (82), 32 states have call predecessors, (82), 31 states have call successors, (82) [2023-11-26 10:47:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 347 transitions. [2023-11-26 10:47:34,002 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 347 transitions. Word has length 47 [2023-11-26 10:47:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:34,003 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 347 transitions. [2023-11-26 10:47:34,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:47:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 347 transitions. [2023-11-26 10:47:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 10:47:34,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:34,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:34,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:47:34,005 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:34,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1728523877, now seen corresponding path program 1 times [2023-11-26 10:47:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198206839] [2023-11-26 10:47:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-26 10:47:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 10:47:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:34,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198206839] [2023-11-26 10:47:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198206839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:34,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:34,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109790169] [2023-11-26 10:47:34,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:34,059 INFO L87 Difference]: Start difference. First operand 231 states and 347 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:47:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:34,112 INFO L93 Difference]: Finished difference Result 447 states and 667 transitions. [2023-11-26 10:47:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-11-26 10:47:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:34,115 INFO L225 Difference]: With dead ends: 447 [2023-11-26 10:47:34,115 INFO L226 Difference]: Without dead ends: 234 [2023-11-26 10:47:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:34,117 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 5 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:34,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-26 10:47:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2023-11-26 10:47:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 179 states have (on average 1.312849162011173) internal successors, (235), 189 states have internal predecessors, (235), 32 states have call successors, (32), 11 states have call predecessors, (32), 21 states have return successors, (82), 32 states have call predecessors, (82), 31 states have call successors, (82) [2023-11-26 10:47:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 349 transitions. [2023-11-26 10:47:34,143 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 349 transitions. Word has length 48 [2023-11-26 10:47:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:34,144 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 349 transitions. [2023-11-26 10:47:34,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:47:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 349 transitions. [2023-11-26 10:47:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 10:47:34,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:34,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:34,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:47:34,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:34,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2056970329, now seen corresponding path program 1 times [2023-11-26 10:47:34,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:34,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007203551] [2023-11-26 10:47:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:34,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:47:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-26 10:47:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 10:47:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007203551] [2023-11-26 10:47:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007203551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968132760] [2023-11-26 10:47:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:34,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:34,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:34,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:47:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:34,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 10:47:34,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:34,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:35,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968132760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:35,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:35,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-26 10:47:35,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656579109] [2023-11-26 10:47:35,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:35,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:47:35,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:47:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:47:35,047 INFO L87 Difference]: Start difference. First operand 233 states and 349 transitions. Second operand has 25 states, 19 states have (on average 2.473684210526316) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-26 10:47:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:36,073 INFO L93 Difference]: Finished difference Result 290 states and 455 transitions. [2023-11-26 10:47:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:47:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.473684210526316) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2023-11-26 10:47:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:36,078 INFO L225 Difference]: With dead ends: 290 [2023-11-26 10:47:36,078 INFO L226 Difference]: Without dead ends: 260 [2023-11-26 10:47:36,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-11-26 10:47:36,082 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 218 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:36,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1988 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:47:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-26 10:47:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 221. [2023-11-26 10:47:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 171 states have (on average 1.327485380116959) internal successors, (227), 180 states have internal predecessors, (227), 30 states have call successors, (30), 9 states have call predecessors, (30), 19 states have return successors, (77), 31 states have call predecessors, (77), 29 states have call successors, (77) [2023-11-26 10:47:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 334 transitions. [2023-11-26 10:47:36,111 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 334 transitions. Word has length 48 [2023-11-26 10:47:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:36,111 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 334 transitions. [2023-11-26 10:47:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.473684210526316) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-26 10:47:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 334 transitions. [2023-11-26 10:47:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 10:47:36,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:36,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:36,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:36,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:47:36,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:36,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:36,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2005808355, now seen corresponding path program 2 times [2023-11-26 10:47:36,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:36,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439916069] [2023-11-26 10:47:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:36,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:36,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:36,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:36,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 10:47:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:36,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-26 10:47:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:36,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 10:47:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:36,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439916069] [2023-11-26 10:47:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439916069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490576334] [2023-11-26 10:47:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:36,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:36,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:36,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:47:36,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:36,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:36,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:47:36,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:36,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:47:37,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490576334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:37,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:37,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-26 10:47:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592426387] [2023-11-26 10:47:37,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:37,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:47:37,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:47:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:47:37,272 INFO L87 Difference]: Start difference. First operand 221 states and 334 transitions. Second operand has 25 states, 19 states have (on average 2.473684210526316) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-26 10:47:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:38,179 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2023-11-26 10:47:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 10:47:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.473684210526316) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2023-11-26 10:47:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:38,184 INFO L225 Difference]: With dead ends: 276 [2023-11-26 10:47:38,184 INFO L226 Difference]: Without dead ends: 257 [2023-11-26 10:47:38,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-11-26 10:47:38,186 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 193 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:38,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1665 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:47:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-26 10:47:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 185. [2023-11-26 10:47:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 142 states have (on average 1.3309859154929577) internal successors, (189), 149 states have internal predecessors, (189), 26 states have call successors, (26), 8 states have call predecessors, (26), 16 states have return successors, (57), 27 states have call predecessors, (57), 25 states have call successors, (57) [2023-11-26 10:47:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 272 transitions. [2023-11-26 10:47:38,215 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 272 transitions. Word has length 48 [2023-11-26 10:47:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:38,215 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 272 transitions. [2023-11-26 10:47:38,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.473684210526316) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-26 10:47:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 272 transitions. [2023-11-26 10:47:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-26 10:47:38,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:38,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:38,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:38,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:47:38,425 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:38,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash 386474914, now seen corresponding path program 1 times [2023-11-26 10:47:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:38,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135964169] [2023-11-26 10:47:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:38,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-26 10:47:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:47:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135964169] [2023-11-26 10:47:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135964169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:47:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729892180] [2023-11-26 10:47:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:38,546 INFO L87 Difference]: Start difference. First operand 185 states and 272 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:47:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:38,668 INFO L93 Difference]: Finished difference Result 209 states and 312 transitions. [2023-11-26 10:47:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-11-26 10:47:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:38,673 INFO L225 Difference]: With dead ends: 209 [2023-11-26 10:47:38,673 INFO L226 Difference]: Without dead ends: 207 [2023-11-26 10:47:38,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:38,675 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:38,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 302 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-26 10:47:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2023-11-26 10:47:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 151 states have (on average 1.3509933774834437) internal successors, (204), 161 states have internal predecessors, (204), 29 states have call successors, (29), 9 states have call predecessors, (29), 17 states have return successors, (60), 27 states have call predecessors, (60), 28 states have call successors, (60) [2023-11-26 10:47:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 293 transitions. [2023-11-26 10:47:38,706 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 293 transitions. Word has length 51 [2023-11-26 10:47:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:38,706 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 293 transitions. [2023-11-26 10:47:38,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:47:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 293 transitions. [2023-11-26 10:47:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-26 10:47:38,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:38,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:38,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:47:38,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash 458755968, now seen corresponding path program 1 times [2023-11-26 10:47:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573679344] [2023-11-26 10:47:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:47:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-26 10:47:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:47:39,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:39,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573679344] [2023-11-26 10:47:39,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573679344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:39,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:39,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:47:39,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728127506] [2023-11-26 10:47:39,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:47:39,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:47:39,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:39,014 INFO L87 Difference]: Start difference. First operand 198 states and 293 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:39,316 INFO L93 Difference]: Finished difference Result 383 states and 604 transitions. [2023-11-26 10:47:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2023-11-26 10:47:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:39,319 INFO L225 Difference]: With dead ends: 383 [2023-11-26 10:47:39,320 INFO L226 Difference]: Without dead ends: 280 [2023-11-26 10:47:39,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:47:39,323 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 18 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:39,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 654 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-26 10:47:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 234. [2023-11-26 10:47:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 184 states have (on average 1.3206521739130435) internal successors, (243), 194 states have internal predecessors, (243), 32 states have call successors, (32), 9 states have call predecessors, (32), 17 states have return successors, (63), 30 states have call predecessors, (63), 31 states have call successors, (63) [2023-11-26 10:47:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 338 transitions. [2023-11-26 10:47:39,358 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 338 transitions. Word has length 52 [2023-11-26 10:47:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:39,359 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 338 transitions. [2023-11-26 10:47:39,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 338 transitions. [2023-11-26 10:47:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-26 10:47:39,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:39,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:39,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:47:39,367 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:39,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1714243087, now seen corresponding path program 1 times [2023-11-26 10:47:39,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:39,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398997326] [2023-11-26 10:47:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:39,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 10:47:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-26 10:47:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:47:39,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398997326] [2023-11-26 10:47:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398997326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:39,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:47:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473704035] [2023-11-26 10:47:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:39,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:47:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:47:39,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:39,679 INFO L87 Difference]: Start difference. First operand 234 states and 338 transitions. Second operand has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:39,919 INFO L93 Difference]: Finished difference Result 382 states and 561 transitions. [2023-11-26 10:47:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2023-11-26 10:47:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:39,923 INFO L225 Difference]: With dead ends: 382 [2023-11-26 10:47:39,923 INFO L226 Difference]: Without dead ends: 268 [2023-11-26 10:47:39,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:47:39,925 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 81 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:39,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1091 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-26 10:47:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2023-11-26 10:47:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 176 states have (on average 1.3238636363636365) internal successors, (233), 186 states have internal predecessors, (233), 31 states have call successors, (31), 9 states have call predecessors, (31), 17 states have return successors, (62), 29 states have call predecessors, (62), 30 states have call successors, (62) [2023-11-26 10:47:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 326 transitions. [2023-11-26 10:47:39,957 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 326 transitions. Word has length 56 [2023-11-26 10:47:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:39,958 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 326 transitions. [2023-11-26 10:47:39,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 326 transitions. [2023-11-26 10:47:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 10:47:39,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:39,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:39,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:47:39,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:39,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:39,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1627866711, now seen corresponding path program 1 times [2023-11-26 10:47:39,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:39,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092098402] [2023-11-26 10:47:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:39,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:47:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:40,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:47:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:40,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 10:47:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:40,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-26 10:47:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092098402] [2023-11-26 10:47:40,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092098402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:40,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:40,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:40,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928409465] [2023-11-26 10:47:40,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:40,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:40,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:40,127 INFO L87 Difference]: Start difference. First operand 225 states and 326 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:47:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:40,190 INFO L93 Difference]: Finished difference Result 315 states and 458 transitions. [2023-11-26 10:47:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:40,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-11-26 10:47:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:40,193 INFO L225 Difference]: With dead ends: 315 [2023-11-26 10:47:40,193 INFO L226 Difference]: Without dead ends: 228 [2023-11-26 10:47:40,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:40,195 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:40,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-26 10:47:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2023-11-26 10:47:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 187 states have internal predecessors, (234), 31 states have call successors, (31), 9 states have call predecessors, (31), 17 states have return successors, (62), 29 states have call predecessors, (62), 30 states have call successors, (62) [2023-11-26 10:47:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 327 transitions. [2023-11-26 10:47:40,230 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 327 transitions. Word has length 57 [2023-11-26 10:47:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:40,231 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 327 transitions. [2023-11-26 10:47:40,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 10:47:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 327 transitions. [2023-11-26 10:47:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 10:47:40,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:40,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:40,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:47:40,234 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:40,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1685125013, now seen corresponding path program 1 times [2023-11-26 10:47:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:40,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841745046] [2023-11-26 10:47:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:40,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:47:40,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:47:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:47:40,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:47:40,423 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:47:40,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 10:47:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 10:47:40,429 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:40,433 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:47:40,469 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated [2023-11-26 10:47:40,470 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet4 could not be translated [2023-11-26 10:47:40,471 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet5 could not be translated [2023-11-26 10:47:40,471 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-11-26 10:47:40,475 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-26 10:47:40,484 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet6 could not be translated [2023-11-26 10:47:40,485 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet7 could not be translated [2023-11-26 10:47:40,487 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet8 could not be translated [2023-11-26 10:47:40,489 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet9 could not be translated [2023-11-26 10:47:40,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:47:40 BoogieIcfgContainer [2023-11-26 10:47:40,508 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:47:40,508 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:47:40,508 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:47:40,509 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:47:40,509 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:17" (3/4) ... [2023-11-26 10:47:40,511 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-26 10:47:40,512 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:47:40,513 INFO L158 Benchmark]: Toolchain (without parser) took 24396.96ms. Allocated memory was 178.3MB in the beginning and 310.4MB in the end (delta: 132.1MB). Free memory was 147.2MB in the beginning and 202.3MB in the end (delta: -55.0MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. [2023-11-26 10:47:40,514 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 125.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:47:40,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.75ms. Allocated memory is still 178.3MB. Free memory was 147.0MB in the beginning and 139.1MB in the end (delta: 8.0MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2023-11-26 10:47:40,514 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.56ms. Allocated memory is still 178.3MB. Free memory was 139.1MB in the beginning and 137.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:47:40,515 INFO L158 Benchmark]: Boogie Preprocessor took 49.69ms. Allocated memory is still 178.3MB. Free memory was 137.9MB in the beginning and 135.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:47:40,519 INFO L158 Benchmark]: RCFGBuilder took 639.33ms. Allocated memory is still 178.3MB. Free memory was 135.0MB in the beginning and 134.4MB in the end (delta: 574.5kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-26 10:47:40,520 INFO L158 Benchmark]: TraceAbstraction took 23309.00ms. Allocated memory was 178.3MB in the beginning and 310.4MB in the end (delta: 132.1MB). Free memory was 133.5MB in the beginning and 202.3MB in the end (delta: -68.7MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2023-11-26 10:47:40,520 INFO L158 Benchmark]: Witness Printer took 4.25ms. Allocated memory is still 310.4MB. Free memory is still 202.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:47:40,525 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 125.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.75ms. Allocated memory is still 178.3MB. Free memory was 147.0MB in the beginning and 139.1MB in the end (delta: 8.0MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.56ms. Allocated memory is still 178.3MB. Free memory was 139.1MB in the beginning and 137.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.69ms. Allocated memory is still 178.3MB. Free memory was 137.9MB in the beginning and 135.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 639.33ms. Allocated memory is still 178.3MB. Free memory was 135.0MB in the beginning and 134.4MB in the end (delta: 574.5kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 23309.00ms. Allocated memory was 178.3MB in the beginning and 310.4MB in the end (delta: 132.1MB). Free memory was 133.5MB in the beginning and 202.3MB in the end (delta: -68.7MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. * Witness Printer took 4.25ms. Allocated memory is still 310.4MB. Free memory is still 202.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L77] EXPR m & ~ (1U << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] EXPR m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=0] [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=127, \old(m)=16777216, __retres4=4278190080, e=127, m=0, res=4278190080] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=16777216, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=4278190080, ea=127, eb=127, ma=16777216, mb=33554432, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4278190080, \old(b)=4294967295] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4278190080, \old(b)=4294967295, a=4278190080, b=4294967295] [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, tmp=4278190080] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, ea=127, ma=16777215, tmp=4278190080] [L111] EXPR ma | (1U << 24U) VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, ea=127, ma=16777215, tmp=4278190080] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, ea=127, eb=127, ma=16777217, mb=0, tmp=4278190080] [L114] EXPR mb | (1U << 24U) VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, ea=127, eb=127, ma=16777217, mb=0, tmp=4278190080] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, ea=127, eb=127, ma=16777217, mb=16777216, tmp=4278190080] [L116] delta = ea - eb VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, delta=0, ea=127, eb=127, ma=16777217, mb=16777216, tmp=4278190080] [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, delta=0, ea=127, eb=127, ma=16777217, mb=16777216, tmp=4278190080] [L118] EXPR mb >> delta VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, delta=0, ea=127, eb=127, ma=16777217, mb=16777216, tmp=4278190080] [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, delta=0, ea=127, eb=127, ma=33554433, mb=16777216, tmp=4278190080] [L127] ma & (1U << 25U) VAL [\old(a)=4278190080, \old(b)=4294967295, a=4294967295, b=4278190080, delta=0, ea=127, eb=127, ma=33554433, mb=16777216, tmp=4278190080] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.2s, OverallIterations: 21, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2266 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2147 mSDsluCounter, 21774 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19617 mSDsCounter, 257 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5874 IncrementalHoareTripleChecker+Invalid, 6131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 257 mSolverCounterUnsat, 2157 mSDtfsCounter, 5874 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1128 GetRequests, 742 SyntacticMatches, 2 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=18, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 899 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1260 NumberOfCodeBlocks, 1244 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1461 ConstructedInterpolants, 1 QuantifiedInterpolants, 2961 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1131 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 35 InterpolantComputations, 13 PerfectInterpolantSequences, 478/566 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-26 10:47:40,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:43,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:43,286 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-26 10:47:43,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:43,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:43,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:43,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:43,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:43,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:43,324 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:43,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:43,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:43,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:43,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:43,328 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:43,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:43,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:43,330 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:43,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:43,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:43,333 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:43,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:43,334 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:43,334 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:47:43,334 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 10:47:43,335 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 10:47:43,335 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:43,336 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:43,336 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:43,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:43,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:43,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:43,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:43,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:43,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:43,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:43,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:43,341 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 10:47:43,341 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 10:47:43,342 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:43,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:43,342 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:43,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:43,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:43,343 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 10:47:43,344 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_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2023-11-26 10:47:43,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:43,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:43,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:43,844 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:43,845 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:43,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-11-26 10:47:47,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:47,375 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:47,375 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-11-26 10:47:47,391 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data/112eba035/21b30b794c534171aae0e8ed09515b2f/FLAGd73dc69c9 [2023-11-26 10:47:47,414 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/data/112eba035/21b30b794c534171aae0e8ed09515b2f [2023-11-26 10:47:47,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:47,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:47,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:47,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:47,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:47,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@beaca58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47, skipping insertion in model container [2023-11-26 10:47:47,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,494 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:47,690 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_7fcbaf1a-f784-4076-af7a-9b9e28534950/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-11-26 10:47:47,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:47,797 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:47,812 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_7fcbaf1a-f784-4076-af7a-9b9e28534950/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-11-26 10:47:47,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:47,890 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:47,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47 WrapperNode [2023-11-26 10:47:47,891 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:47,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:47,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:47,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:47,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,944 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-11-26 10:47:47,945 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:47,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:47,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:47,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:47,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,962 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,976 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:47:47,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,977 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,984 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:47,993 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:48,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:48,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:48,035 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:48,035 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:48,036 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (1/1) ... [2023-11-26 10:47:48,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:48,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:48,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 10:47:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-26 10:47:48,136 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-26 10:47:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:48,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-26 10:47:48,140 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-26 10:47:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:47:48,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:47:48,279 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:48,282 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:48,647 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:48,698 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:48,699 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:47:48,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:48 BoogieIcfgContainer [2023-11-26 10:47:48,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:48,703 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:48,703 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:48,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:48,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:47" (1/3) ... [2023-11-26 10:47:48,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6709415c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:48, skipping insertion in model container [2023-11-26 10:47:48,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:47" (2/3) ... [2023-11-26 10:47:48,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6709415c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:48, skipping insertion in model container [2023-11-26 10:47:48,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:48" (3/3) ... [2023-11-26 10:47:48,712 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-11-26 10:47:48,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:48,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:47:48,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:48,805 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;@4ba44394, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:48,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:47:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:47:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:47:48,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:48,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:48,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:48,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1974951318, now seen corresponding path program 1 times [2023-11-26 10:47:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396473437] [2023-11-26 10:47:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:48,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:48,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:48,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-26 10:47:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:48,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:47:48,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:49,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:49,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396473437] [2023-11-26 10:47:49,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396473437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:49,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:49,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:47:49,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365683251] [2023-11-26 10:47:49,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:49,176 INFO L87 Difference]: Start difference. First operand has 49 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:49,399 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2023-11-26 10:47:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-11-26 10:47:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:49,413 INFO L225 Difference]: With dead ends: 115 [2023-11-26 10:47:49,414 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 10:47:49,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:49,423 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:49,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 393 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 10:47:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2023-11-26 10:47:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 43 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-26 10:47:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2023-11-26 10:47:49,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 27 [2023-11-26 10:47:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:49,496 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2023-11-26 10:47:49,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2023-11-26 10:47:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 10:47:49,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:49,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:49,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:49,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:49,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:49,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1701845995, now seen corresponding path program 1 times [2023-11-26 10:47:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:49,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441650307] [2023-11-26 10:47:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:49,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:49,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-26 10:47:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:47:49,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:49,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:50,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:50,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441650307] [2023-11-26 10:47:50,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441650307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:50,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:50,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2023-11-26 10:47:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547048654] [2023-11-26 10:47:50,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:47:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:47:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:50,027 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:47:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:50,197 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2023-11-26 10:47:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:47:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-26 10:47:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:50,200 INFO L225 Difference]: With dead ends: 111 [2023-11-26 10:47:50,200 INFO L226 Difference]: Without dead ends: 84 [2023-11-26 10:47:50,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:47:50,203 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:50,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 439 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-26 10:47:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2023-11-26 10:47:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-26 10:47:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2023-11-26 10:47:50,218 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 31 [2023-11-26 10:47:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:50,219 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2023-11-26 10:47:50,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:47:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2023-11-26 10:47:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 10:47:50,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:50,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:50,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:50,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2061916751, now seen corresponding path program 1 times [2023-11-26 10:47:50,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:50,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539775800] [2023-11-26 10:47:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:50,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:50,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:50,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-26 10:47:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:50,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:47:50,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:50,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:50,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:50,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539775800] [2023-11-26 10:47:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539775800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:50,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-11-26 10:47:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606917195] [2023-11-26 10:47:50,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:50,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:50,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:50,705 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:50,836 INFO L93 Difference]: Finished difference Result 104 states and 139 transitions. [2023-11-26 10:47:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:50,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-11-26 10:47:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:50,839 INFO L225 Difference]: With dead ends: 104 [2023-11-26 10:47:50,840 INFO L226 Difference]: Without dead ends: 81 [2023-11-26 10:47:50,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:50,842 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 13 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:50,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 402 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-26 10:47:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2023-11-26 10:47:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-26 10:47:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-11-26 10:47:50,856 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 34 [2023-11-26 10:47:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:50,857 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-11-26 10:47:50,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:47:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-11-26 10:47:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:47:50,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:50,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:50,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:51,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 922216448, now seen corresponding path program 2 times [2023-11-26 10:47:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006969567] [2023-11-26 10:47:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:51,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:51,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:51,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-26 10:47:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:47:51,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:51,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:47:51,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:47:51,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:51,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006969567] [2023-11-26 10:47:51,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006969567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:51,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:51,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:51,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544381780] [2023-11-26 10:47:51,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:51,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:51,323 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:52,642 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2023-11-26 10:47:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-26 10:47:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:52,647 INFO L225 Difference]: With dead ends: 97 [2023-11-26 10:47:52,647 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 10:47:52,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:52,649 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:52,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 288 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:47:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 10:47:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2023-11-26 10:47:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2023-11-26 10:47:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2023-11-26 10:47:52,676 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 35 [2023-11-26 10:47:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:52,677 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2023-11-26 10:47:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2023-11-26 10:47:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:47:52,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:52,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:52,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:52,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:52,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:52,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash 979474750, now seen corresponding path program 1 times [2023-11-26 10:47:52,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:52,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229650702] [2023-11-26 10:47:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:52,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:52,888 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:52,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-26 10:47:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:52,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:47:52,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:47:53,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:53,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229650702] [2023-11-26 10:47:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229650702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:53,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:53,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176927181] [2023-11-26 10:47:53,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:53,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:53,082 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:56,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:47:57,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:47:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:57,844 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2023-11-26 10:47:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:57,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-26 10:47:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:57,847 INFO L225 Difference]: With dead ends: 90 [2023-11-26 10:47:57,848 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:47:57,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:57,849 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 28 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:57,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 262 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2023-11-26 10:47:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:47:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2023-11-26 10:47:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 58 states have internal predecessors, (71), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-26 10:47:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-11-26 10:47:57,864 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 35 [2023-11-26 10:47:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:57,864 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-11-26 10:47:57,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:47:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-11-26 10:47:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:57,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:57,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:57,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:58,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:58,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 539553575, now seen corresponding path program 1 times [2023-11-26 10:47:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55095528] [2023-11-26 10:47:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:58,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:58,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:58,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-26 10:47:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:58,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:47:58,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:58,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:58,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55095528] [2023-11-26 10:47:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55095528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:58,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 10:47:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325910294] [2023-11-26 10:47:58,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:58,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:47:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:58,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:47:58,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:47:58,323 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:47:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:58,650 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2023-11-26 10:47:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:47:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-26 10:47:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:58,653 INFO L225 Difference]: With dead ends: 116 [2023-11-26 10:47:58,653 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 10:47:58,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:47:58,654 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 31 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:58,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 503 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 10:47:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2023-11-26 10:47:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 68 states have internal predecessors, (83), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2023-11-26 10:47:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2023-11-26 10:47:58,691 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 38 [2023-11-26 10:47:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:58,693 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2023-11-26 10:47:58,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:47:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2023-11-26 10:47:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:47:58,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:58,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:58,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:58,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:58,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:58,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1568323699, now seen corresponding path program 1 times [2023-11-26 10:47:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869330151] [2023-11-26 10:47:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:58,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:58,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:58,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:58,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-26 10:47:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:58,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:47:58,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:59,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:47:59,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869330151] [2023-11-26 10:47:59,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869330151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:59,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:59,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2023-11-26 10:47:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535869217] [2023-11-26 10:47:59,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:59,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:47:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:47:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:47:59,375 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:47:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:59,726 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2023-11-26 10:47:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:47:59,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2023-11-26 10:47:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:59,730 INFO L225 Difference]: With dead ends: 123 [2023-11-26 10:47:59,730 INFO L226 Difference]: Without dead ends: 115 [2023-11-26 10:47:59,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:47:59,731 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 31 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:59,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 704 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-26 10:47:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2023-11-26 10:47:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 75 states have internal predecessors, (92), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2023-11-26 10:47:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2023-11-26 10:47:59,747 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 40 [2023-11-26 10:47:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:59,748 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2023-11-26 10:47:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:47:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2023-11-26 10:47:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:47:59,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:59,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:59,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:59,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:59,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:59,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1511065397, now seen corresponding path program 1 times [2023-11-26 10:47:59,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:59,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097745542] [2023-11-26 10:47:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:59,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:59,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:59,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-26 10:48:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:00,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:48:00,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-26 10:48:00,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:00,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:48:00,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097745542] [2023-11-26 10:48:00,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097745542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:00,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:00,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:48:00,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583655953] [2023-11-26 10:48:00,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:00,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:48:00,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:48:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:48:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:00,053 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 10:48:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:00,123 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2023-11-26 10:48:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:48:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2023-11-26 10:48:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:00,130 INFO L225 Difference]: With dead ends: 110 [2023-11-26 10:48:00,130 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 10:48:00,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:48:00,132 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:00,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 284 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 10:48:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-26 10:48:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 71 states have internal predecessors, (85), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2023-11-26 10:48:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2023-11-26 10:48:00,173 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 40 [2023-11-26 10:48:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:00,174 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2023-11-26 10:48:00,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 10:48:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2023-11-26 10:48:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 10:48:00,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:00,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:00,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-26 10:48:00,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:48:00,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:00,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1965766502, now seen corresponding path program 1 times [2023-11-26 10:48:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:48:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486813462] [2023-11-26 10:48:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:00,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:48:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:48:00,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:48:00,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fcbaf1a-f784-4076-af7a-9b9e28534950/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-26 10:48:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:00,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:48:00,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:48:00,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:48:01,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:48:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486813462] [2023-11-26 10:48:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486813462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:01,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:01,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-26 10:48:01,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579211328] [2023-11-26 10:48:01,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:48:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:48:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:48:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:48:01,246 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7)