./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/phases_1-1.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_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/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_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/phases_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/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_fa418f4c-7162-4c99-81a3-b22688acb1e4/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 bc900b1bfcaecf91bc89637deaef4e1ddf2476faf43fa7e6f1e197c315ae3982 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:38,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:38,206 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:49:38,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:38,212 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:38,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:38,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:38,239 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:38,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:38,241 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:38,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:38,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:38,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:38,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:38,245 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:38,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:38,246 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:49:38,247 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:38,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:38,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:38,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:38,250 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:49:38,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:38,251 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:49:38,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:38,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:49:38,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:38,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:38,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:38,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:38,256 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:38,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:38,257 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:38,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:38,258 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:49:38,258 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:38,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:38,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:38,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:38,260 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:49:38,260 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:38,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:38,261 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_fa418f4c-7162-4c99-81a3-b22688acb1e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc900b1bfcaecf91bc89637deaef4e1ddf2476faf43fa7e6f1e197c315ae3982 [2023-11-26 10:49:38,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:38,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:38,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:38,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:38,594 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:38,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/loop-acceleration/phases_1-1.c [2023-11-26 10:49:41,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:41,894 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:41,895 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/sv-benchmarks/c/loop-acceleration/phases_1-1.c [2023-11-26 10:49:41,901 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/data/e6bad7820/a29299f13de74ea380d8b512f208b841/FLAG19c18d03a [2023-11-26 10:49:41,916 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/data/e6bad7820/a29299f13de74ea380d8b512f208b841 [2023-11-26 10:49:41,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:41,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:41,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:41,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:41,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:41,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:41" (1/1) ... [2023-11-26 10:49:41,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1046c16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:41, skipping insertion in model container [2023-11-26 10:49:41,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:41" (1/1) ... [2023-11-26 10:49:41,950 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:42,096 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_fa418f4c-7162-4c99-81a3-b22688acb1e4/sv-benchmarks/c/loop-acceleration/phases_1-1.c[322,335] [2023-11-26 10:49:42,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:42,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:42,134 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_fa418f4c-7162-4c99-81a3-b22688acb1e4/sv-benchmarks/c/loop-acceleration/phases_1-1.c[322,335] [2023-11-26 10:49:42,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:42,150 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:42,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42 WrapperNode [2023-11-26 10:49:42,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:42,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:42,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:42,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:42,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,166 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,184 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2023-11-26 10:49:42,184 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:42,185 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:42,185 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:42,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:42,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,209 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 10:49:42,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,212 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:42,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:42,220 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:42,220 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:42,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:42,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:42,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:42,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:42,357 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:42,360 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:42,466 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:42,487 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:42,488 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:49:42,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:42 BoogieIcfgContainer [2023-11-26 10:49:42,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:42,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:42,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:42,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:42,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:41" (1/3) ... [2023-11-26 10:49:42,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed0a788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:42, skipping insertion in model container [2023-11-26 10:49:42,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (2/3) ... [2023-11-26 10:49:42,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed0a788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:42, skipping insertion in model container [2023-11-26 10:49:42,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:42" (3/3) ... [2023-11-26 10:49:42,500 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_1-1.c [2023-11-26 10:49:42,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:42,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:49:42,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:42,576 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;@7d83d229, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:42,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:49:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 10:49:42,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:42,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:42,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:42,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 62462887, now seen corresponding path program 1 times [2023-11-26 10:49:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:42,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920838040] [2023-11-26 10:49:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:42,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:42,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920838040] [2023-11-26 10:49:42,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920838040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:42,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:42,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643402248] [2023-11-26 10:49:42,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:42,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:49:42,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:49:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:49:42,837 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:42,858 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2023-11-26 10:49:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:49:42,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 10:49:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:42,869 INFO L225 Difference]: With dead ends: 15 [2023-11-26 10:49:42,869 INFO L226 Difference]: Without dead ends: 7 [2023-11-26 10:49:42,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:49:42,876 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:42,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-26 10:49:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-26 10:49:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2023-11-26 10:49:42,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2023-11-26 10:49:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:42,914 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2023-11-26 10:49:42,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2023-11-26 10:49:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 10:49:42,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:42,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:49:42,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 62164977, now seen corresponding path program 1 times [2023-11-26 10:49:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:42,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871213136] [2023-11-26 10:49:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:42,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:43,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871213136] [2023-11-26 10:49:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871213136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:43,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:43,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:43,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752377676] [2023-11-26 10:49:43,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:43,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:43,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:43,133 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:43,187 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-26 10:49:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 10:49:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:43,189 INFO L225 Difference]: With dead ends: 15 [2023-11-26 10:49:43,190 INFO L226 Difference]: Without dead ends: 9 [2023-11-26 10:49:43,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:49:43,192 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:43,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-26 10:49:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-26 10:49:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-26 10:49:43,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2023-11-26 10:49:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:43,202 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-26 10:49:43,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-26 10:49:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 10:49:43,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:43,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:43,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:49:43,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:43,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash -338656492, now seen corresponding path program 1 times [2023-11-26 10:49:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:43,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146768612] [2023-11-26 10:49:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:43,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:43,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146768612] [2023-11-26 10:49:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146768612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949677250] [2023-11-26 10:49:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:43,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:43,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:43,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:49:43,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:43,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949677250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:43,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:43,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:49:43,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231159365] [2023-11-26 10:49:43,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:43,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:49:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:49:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:49:43,743 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:43,824 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2023-11-26 10:49:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 10:49:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:43,828 INFO L225 Difference]: With dead ends: 19 [2023-11-26 10:49:43,833 INFO L226 Difference]: Without dead ends: 13 [2023-11-26 10:49:43,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:49:43,835 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:43,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-26 10:49:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-26 10:49:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-26 10:49:43,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2023-11-26 10:49:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:43,842 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-26 10:49:43,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-26 10:49:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:49:43,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:43,844 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:43,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:49:44,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:44,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:44,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 28316188, now seen corresponding path program 1 times [2023-11-26 10:49:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:44,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792905034] [2023-11-26 10:49:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:44,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:44,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:44,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792905034] [2023-11-26 10:49:44,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792905034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:44,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534062733] [2023-11-26 10:49:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:44,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:44,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:44,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:49:44,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:44,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:49:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534062733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:44,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:44,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2023-11-26 10:49:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251938524] [2023-11-26 10:49:44,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:49:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:49:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:49:44,471 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:44,607 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-26 10:49:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:49:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-26 10:49:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:44,610 INFO L225 Difference]: With dead ends: 26 [2023-11-26 10:49:44,610 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 10:49:44,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:49:44,616 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:44,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 10:49:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-26 10:49:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-26 10:49:44,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-11-26 10:49:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:44,635 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-26 10:49:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-26 10:49:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:49:44,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:44,637 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:44,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:44,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:44,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash -280764673, now seen corresponding path program 2 times [2023-11-26 10:49:44,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:44,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236923259] [2023-11-26 10:49:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:44,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:44,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:44,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236923259] [2023-11-26 10:49:44,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236923259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:44,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240955092] [2023-11-26 10:49:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:44,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:44,983 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:45,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:45,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:45,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:45,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:45,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:45,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240955092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:45,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:45,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 11 [2023-11-26 10:49:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401125595] [2023-11-26 10:49:45,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:45,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:49:45,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:49:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:49:45,282 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:45,935 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-11-26 10:49:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:49:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-26 10:49:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:45,937 INFO L225 Difference]: With dead ends: 35 [2023-11-26 10:49:45,937 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 10:49:45,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:49:45,938 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:45,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 10:49:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-26 10:49:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-26 10:49:45,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 13 [2023-11-26 10:49:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:45,950 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-26 10:49:45,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-26 10:49:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:49:45,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:45,951 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:45,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:46,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash -531885935, now seen corresponding path program 3 times [2023-11-26 10:49:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056057139] [2023-11-26 10:49:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:46,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:46,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056057139] [2023-11-26 10:49:46,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056057139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:46,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531887237] [2023-11-26 10:49:46,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:49:46,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:46,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:46,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:46,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 10:49:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:46,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:46,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-26 10:49:46,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-26 10:49:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531887237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:46,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:46,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 16 [2023-11-26 10:49:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387394347] [2023-11-26 10:49:46,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:46,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:49:46,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:49:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:49:46,738 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:47,041 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2023-11-26 10:49:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:49:47,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:49:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:47,043 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:49:47,043 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 10:49:47,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:49:47,045 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:47,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:49:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 10:49:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-11-26 10:49:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-26 10:49:47,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2023-11-26 10:49:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:47,058 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-26 10:49:47,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-26 10:49:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:49:47,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:47,059 INFO L195 NwaCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1] [2023-11-26 10:49:47,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:47,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:49:47,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:47,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2086199994, now seen corresponding path program 4 times [2023-11-26 10:49:47,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:47,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68781927] [2023-11-26 10:49:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:47,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:49:47,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:47,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68781927] [2023-11-26 10:49:47,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68781927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:47,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407336689] [2023-11-26 10:49:47,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:49:47,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:47,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:47,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa418f4c-7162-4c99-81a3-b22688acb1e4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:49:47,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:49:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:47,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 10:49:47,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:49:47,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:49:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407336689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:48,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:48,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 31 [2023-11-26 10:49:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478679292] [2023-11-26 10:49:48,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:48,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 10:49:48,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 10:49:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2023-11-26 10:49:48,817 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)