./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/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_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/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_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/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 3f8ee4f5181b3404c1367dbf131683f1e761cea6b176154f687b628466c991fe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:00:47,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:00:47,951 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:00:47,956 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:00:47,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:00:47,983 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:00:47,984 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:00:47,985 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:00:47,986 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:00:47,986 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:00:47,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:00:47,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:00:47,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:00:47,989 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:00:47,990 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:00:47,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:00:47,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:00:47,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:00:47,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:00:47,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:00:47,994 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:00:47,995 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:00:47,995 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:00:47,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:00:47,996 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:00:47,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:00:47,997 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:00:47,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:00:47,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:00:47,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:00:47,999 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:00:48,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:48,000 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:00:48,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:00:48,001 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:00:48,001 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:00:48,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:00:48,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:00:48,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:00:48,003 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:00:48,004 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:00:48,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:00:48,005 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_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f8ee4f5181b3404c1367dbf131683f1e761cea6b176154f687b628466c991fe [2023-11-26 12:00:48,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:00:48,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:00:48,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:00:48,373 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:00:48,374 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:00:48,375 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2023-11-26 12:00:51,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:51,830 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:51,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2023-11-26 12:00:51,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/data/eecf2f6e2/c6788f2452c84ad688f40a4e271bd1c7/FLAG0283cc203 [2023-11-26 12:00:51,869 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/data/eecf2f6e2/c6788f2452c84ad688f40a4e271bd1c7 [2023-11-26 12:00:51,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:51,874 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:51,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:51,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:51,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:51,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a0e03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:51, skipping insertion in model container [2023-11-26 12:00:51,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:51" (1/1) ... [2023-11-26 12:00:51,906 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:52,072 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_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c[454,467] [2023-11-26 12:00:52,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:52,088 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:52,100 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_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c[454,467] [2023-11-26 12:00:52,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:52,115 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:52,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52 WrapperNode [2023-11-26 12:00:52,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:52,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:52,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:52,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:52,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,146 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-11-26 12:00:52,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:52,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:52,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:52,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:52,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,169 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 12:00:52,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,174 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,177 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:52,178 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:52,178 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:52,178 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:52,180 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (1/1) ... [2023-11-26 12:00:52,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:52,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:52,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-11-26 12:00:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-11-26 12:00:52,361 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:52,364 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:52,557 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:52,595 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:52,595 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:00:52,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:52 BoogieIcfgContainer [2023-11-26 12:00:52,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:52,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:52,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:52,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:52,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:51" (1/3) ... [2023-11-26 12:00:52,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5790195d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:52, skipping insertion in model container [2023-11-26 12:00:52,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:52" (2/3) ... [2023-11-26 12:00:52,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5790195d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:52, skipping insertion in model container [2023-11-26 12:00:52,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:52" (3/3) ... [2023-11-26 12:00:52,613 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2023-11-26 12:00:52,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:52,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:00:52,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:52,721 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;@305a25fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:52,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:00:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 12:00:52,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:52,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:52,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:52,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-11-26 12:00:52,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910440682] [2023-11-26 12:00:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:52,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:00:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,079 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 12:00:53,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910440682] [2023-11-26 12:00:53,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910440682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:53,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:53,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:00:53,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496505776] [2023-11-26 12:00:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:00:53,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:00:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:53,131 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:53,210 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-11-26 12:00:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:00:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-26 12:00:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:53,221 INFO L225 Difference]: With dead ends: 22 [2023-11-26 12:00:53,222 INFO L226 Difference]: Without dead ends: 14 [2023-11-26 12:00:53,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 12:00:53,229 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:53,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-26 12:00:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-26 12:00:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 12:00:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-26 12:00:53,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-11-26 12:00:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:53,271 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-26 12:00:53,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-26 12:00:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 12:00:53,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:53,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:53,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:00:53,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:53,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-11-26 12:00:53,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:53,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727827337] [2023-11-26 12:00:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:00:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:53,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:53,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727827337] [2023-11-26 12:00:53,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727827337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:53,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127761093] [2023-11-26 12:00:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:53,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:53,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:00:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:53,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:53,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:00:53,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:53,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127761093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:53,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-11-26 12:00:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132606225] [2023-11-26 12:00:53,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:00:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:00:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:53,977 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 12:00:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:54,036 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-11-26 12:00:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 15 [2023-11-26 12:00:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:54,039 INFO L225 Difference]: With dead ends: 21 [2023-11-26 12:00:54,039 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 12:00:54,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:54,041 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:54,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 12:00:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-26 12:00:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 12:00:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-26 12:00:54,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-11-26 12:00:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:54,049 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-26 12:00:54,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 12:00:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-26 12:00:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 12:00:54,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:54,051 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:54,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:54,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:54,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:54,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2023-11-26 12:00:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:54,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546299725] [2023-11-26 12:00:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:54,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:00:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:00:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546299725] [2023-11-26 12:00:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546299725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196091509] [2023-11-26 12:00:54,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:00:54,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:54,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:54,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:00:54,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:00:54,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:54,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:54,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 12:00:54,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196091509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:55,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2023-11-26 12:00:55,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686107012] [2023-11-26 12:00:55,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:00:55,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:00:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:55,096 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-26 12:00:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:55,178 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-26 12:00:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:00:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2023-11-26 12:00:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:55,180 INFO L225 Difference]: With dead ends: 24 [2023-11-26 12:00:55,180 INFO L226 Difference]: Without dead ends: 20 [2023-11-26 12:00:55,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:00:55,182 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:55,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-26 12:00:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-26 12:00:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 12:00:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-26 12:00:55,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2023-11-26 12:00:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:55,189 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-26 12:00:55,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-26 12:00:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-26 12:00:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 12:00:55,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:55,191 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:55,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 12:00:55,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:55,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:55,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2023-11-26 12:00:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:55,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228150820] [2023-11-26 12:00:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:00:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:00:55,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228150820] [2023-11-26 12:00:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228150820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:55,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305688968] [2023-11-26 12:00:55,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:00:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:55,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:55,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:00:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 12:00:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:55,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:00:55,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 12:00:55,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:00:56,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305688968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:56,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:56,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2023-11-26 12:00:56,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792943522] [2023-11-26 12:00:56,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:56,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:00:56,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:00:56,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:00:56,429 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-26 12:00:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:56,542 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-26 12:00:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:56,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 27 [2023-11-26 12:00:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:56,550 INFO L225 Difference]: With dead ends: 27 [2023-11-26 12:00:56,550 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 12:00:56,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:00:56,551 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:56,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 12:00:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-26 12:00:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 12:00:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-26 12:00:56,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2023-11-26 12:00:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:56,559 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-26 12:00:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-26 12:00:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-26 12:00:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:00:56,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:56,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:56,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:56,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:56,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:56,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2023-11-26 12:00:56,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:56,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841452231] [2023-11-26 12:00:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:56,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:00:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:56,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:57,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 12:00:57,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841452231] [2023-11-26 12:00:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841452231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733392527] [2023-11-26 12:00:57,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:00:57,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:57,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:00:57,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:00:57,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:57,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 12:00:57,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-26 12:00:57,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 12:00:58,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733392527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:58,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2023-11-26 12:00:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596306289] [2023-11-26 12:00:58,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 12:00:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 12:00:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:00:58,210 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-26 12:00:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:58,314 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-11-26 12:00:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:00:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 33 [2023-11-26 12:00:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:58,316 INFO L225 Difference]: With dead ends: 30 [2023-11-26 12:00:58,316 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 12:00:58,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:00:58,319 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:58,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 12:00:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-26 12:00:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-26 12:00:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-26 12:00:58,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2023-11-26 12:00:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:58,334 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-26 12:00:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-26 12:00:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-26 12:00:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 12:00:58,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:58,336 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:58,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 12:00:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:58,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:58,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2023-11-26 12:00:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344855310] [2023-11-26 12:00:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:00:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:00:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-26 12:00:58,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:58,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344855310] [2023-11-26 12:00:58,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344855310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:58,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246352459] [2023-11-26 12:00:58,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:00:58,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:58,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:58,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:58,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:00:58,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-26 12:00:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:00:58,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:00:58,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-26 12:00:59,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 12:01:00,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246352459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:00,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:00,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2023-11-26 12:01:00,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417329101] [2023-11-26 12:01:00,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 12:01:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 12:01:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:01:00,452 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-26 12:01:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:00,566 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-11-26 12:01:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:01:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 39 [2023-11-26 12:01:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:00,571 INFO L225 Difference]: With dead ends: 33 [2023-11-26 12:01:00,571 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 12:01:00,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2023-11-26 12:01:00,574 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:00,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 12:01:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-26 12:01:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 12:01:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-26 12:01:00,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2023-11-26 12:01:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:00,592 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-26 12:01:00,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-26 12:01:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-26 12:01:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-26 12:01:00,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:00,597 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:00,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 12:01:00,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:00,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2023-11-26 12:01:00,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:00,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855077187] [2023-11-26 12:01:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-26 12:01:01,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:01,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855077187] [2023-11-26 12:01:01,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855077187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:01,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810992912] [2023-11-26 12:01:01,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:01:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:01,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:01,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:01:01,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-26 12:01:01,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:01,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 12:01:01,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 12:01:01,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 12:01:03,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810992912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:03,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:03,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2023-11-26 12:01:03,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628899895] [2023-11-26 12:01:03,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:03,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:01:03,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:03,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:01:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:01:03,615 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-26 12:01:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:03,725 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-26 12:01:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:01:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 45 [2023-11-26 12:01:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:03,728 INFO L225 Difference]: With dead ends: 36 [2023-11-26 12:01:03,728 INFO L226 Difference]: Without dead ends: 32 [2023-11-26 12:01:03,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2023-11-26 12:01:03,730 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:03,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 54 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:01:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-26 12:01:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-26 12:01:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-26 12:01:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-26 12:01:03,736 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2023-11-26 12:01:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:03,737 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-26 12:01:03,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-26 12:01:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-26 12:01:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-26 12:01:03,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:03,739 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:03,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:03,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:03,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2023-11-26 12:01:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:03,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574388876] [2023-11-26 12:01:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-26 12:01:04,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:04,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574388876] [2023-11-26 12:01:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574388876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400714501] [2023-11-26 12:01:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 12:01:04,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:04,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:04,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:01:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:04,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 12:01:04,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-26 12:01:04,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-26 12:01:07,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400714501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:07,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:07,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2023-11-26 12:01:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808084668] [2023-11-26 12:01:07,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:07,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:01:07,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:07,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:01:07,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:01:07,488 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-26 12:01:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:07,636 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-11-26 12:01:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:01:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 51 [2023-11-26 12:01:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:07,638 INFO L225 Difference]: With dead ends: 39 [2023-11-26 12:01:07,638 INFO L226 Difference]: Without dead ends: 35 [2023-11-26 12:01:07,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2023-11-26 12:01:07,640 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:07,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-26 12:01:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-26 12:01:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-26 12:01:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-11-26 12:01:07,646 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2023-11-26 12:01:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:07,646 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-11-26 12:01:07,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-26 12:01:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-11-26 12:01:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 12:01:07,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:07,648 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:07,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:07,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:07,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:07,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:07,853 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2023-11-26 12:01:07,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:07,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484800810] [2023-11-26 12:01:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-26 12:01:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484800810] [2023-11-26 12:01:08,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484800810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947346290] [2023-11-26 12:01:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:01:08,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:08,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:08,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:01:08,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:01:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:08,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 12:01:08,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 12:01:08,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-26 12:01:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947346290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:12,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:12,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2023-11-26 12:01:12,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56016674] [2023-11-26 12:01:12,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:12,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 12:01:12,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 12:01:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2023-11-26 12:01:12,626 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-26 12:01:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:12,782 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-11-26 12:01:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:01:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 57 [2023-11-26 12:01:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:12,785 INFO L225 Difference]: With dead ends: 42 [2023-11-26 12:01:12,785 INFO L226 Difference]: Without dead ends: 38 [2023-11-26 12:01:12,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=803, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 12:01:12,787 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:12,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-26 12:01:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-26 12:01:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-26 12:01:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-11-26 12:01:12,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2023-11-26 12:01:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:12,794 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-11-26 12:01:12,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-26 12:01:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-11-26 12:01:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 12:01:12,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:12,796 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:12,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:13,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:13,017 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:13,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:13,018 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2023-11-26 12:01:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:13,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932060304] [2023-11-26 12:01:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:13,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-26 12:01:13,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932060304] [2023-11-26 12:01:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932060304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358229846] [2023-11-26 12:01:13,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:01:13,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:13,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:13,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:13,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:01:13,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-26 12:01:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:13,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 12:01:13,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-26 12:01:13,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 12:01:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358229846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:18,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:18,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2023-11-26 12:01:18,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580665172] [2023-11-26 12:01:18,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:18,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 12:01:18,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 12:01:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:01:18,962 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-26 12:01:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:19,165 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-26 12:01:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 12:01:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 63 [2023-11-26 12:01:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:19,171 INFO L225 Difference]: With dead ends: 45 [2023-11-26 12:01:19,172 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 12:01:19,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 12:01:19,173 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:19,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 65 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 12:01:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-26 12:01:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 12:01:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-11-26 12:01:19,192 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2023-11-26 12:01:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-11-26 12:01:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-26 12:01:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-11-26 12:01:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 12:01:19,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:19,194 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:19,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:19,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:01:19,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:19,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2023-11-26 12:01:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:19,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569352021] [2023-11-26 12:01:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:19,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:19,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 12:01:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569352021] [2023-11-26 12:01:20,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569352021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104468209] [2023-11-26 12:01:20,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:01:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:20,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:20,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:01:20,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:01:20,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:20,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-26 12:01:20,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-26 12:01:20,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-26 12:01:21,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104468209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:21,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 27 [2023-11-26 12:01:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489154030] [2023-11-26 12:01:21,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 12:01:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 12:01:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:01:21,512 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 12:01:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:22,122 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-11-26 12:01:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 12:01:22,122 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) Word has length 69 [2023-11-26 12:01:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:22,123 INFO L225 Difference]: With dead ends: 48 [2023-11-26 12:01:22,123 INFO L226 Difference]: Without dead ends: 44 [2023-11-26 12:01:22,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2023-11-26 12:01:22,125 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:22,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 363 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:01:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-26 12:01:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-26 12:01:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-26 12:01:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-26 12:01:22,130 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2023-11-26 12:01:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:22,131 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-26 12:01:22,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 12:01:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-26 12:01:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-26 12:01:22,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:22,132 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:22,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:22,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:22,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:22,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2023-11-26 12:01:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623627819] [2023-11-26 12:01:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:22,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:01:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:22,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 33 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-11-26 12:01:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623627819] [2023-11-26 12:01:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623627819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:23,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521880037] [2023-11-26 12:01:23,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:01:23,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:23,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:23,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:01:23,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-26 12:01:23,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:23,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 12:01:23,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-26 12:01:23,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:23,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521880037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:23,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:01:23,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [17] total 19 [2023-11-26 12:01:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532438095] [2023-11-26 12:01:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:01:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:01:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:01:23,720 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 12:01:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:23,916 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-11-26 12:01:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:01:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) Word has length 75 [2023-11-26 12:01:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:23,918 INFO L225 Difference]: With dead ends: 44 [2023-11-26 12:01:23,918 INFO L226 Difference]: Without dead ends: 0 [2023-11-26 12:01:23,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2023-11-26 12:01:23,919 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:23,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 102 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:01:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-26 12:01:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-26 12:01:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 12:01:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-26 12:01:23,921 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2023-11-26 12:01:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:23,921 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 12:01:23,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 12:01:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-26 12:01:23,921 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-26 12:01:23,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 12:01:23,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:24,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 12:01:24,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-26 12:01:24,146 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-26 12:01:24,146 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-11-26 12:01:24,147 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-11-26 12:01:24,147 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2023-11-26 12:01:24,147 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (= |ULTIMATE.start_main_~input~0#1| 10) [2023-11-26 12:01:24,147 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-11-26 12:01:24,147 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2023-11-26 12:01:24,148 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-26 12:01:24,148 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2023-11-26 12:01:24,148 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2023-11-26 12:01:24,148 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 9) the Hoare annotation is: true [2023-11-26 12:01:24,148 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2023-11-26 12:01:24,148 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-11-26 12:01:24,149 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2023-11-26 12:01:24,153 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1] [2023-11-26 12:01:24,156 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 12:01:24,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:01:24 BoogieIcfgContainer [2023-11-26 12:01:24,161 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 12:01:24,162 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 12:01:24,162 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 12:01:24,162 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 12:01:24,163 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:52" (3/4) ... [2023-11-26 12:01:24,165 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 12:01:24,169 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2023-11-26 12:01:24,176 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-11-26 12:01:24,176 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-26 12:01:24,177 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-26 12:01:24,177 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-26 12:01:24,270 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 12:01:24,271 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 12:01:24,271 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 12:01:24,272 INFO L158 Benchmark]: Toolchain (without parser) took 32398.04ms. Allocated memory was 138.4MB in the beginning and 293.6MB in the end (delta: 155.2MB). Free memory was 107.9MB in the beginning and 180.5MB in the end (delta: -72.6MB). Peak memory consumption was 83.2MB. Max. memory is 16.1GB. [2023-11-26 12:01:24,272 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:01:24,273 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.59ms. Allocated memory is still 138.4MB. Free memory was 107.3MB in the beginning and 97.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 12:01:24,273 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.53ms. Allocated memory is still 138.4MB. Free memory was 97.4MB in the beginning and 95.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:01:24,274 INFO L158 Benchmark]: Boogie Preprocessor took 29.26ms. Allocated memory is still 138.4MB. Free memory was 95.9MB in the beginning and 94.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:01:24,274 INFO L158 Benchmark]: RCFGBuilder took 418.57ms. Allocated memory is still 138.4MB. Free memory was 94.1MB in the beginning and 84.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 12:01:24,275 INFO L158 Benchmark]: TraceAbstraction took 31559.52ms. Allocated memory was 138.4MB in the beginning and 293.6MB in the end (delta: 155.2MB). Free memory was 83.7MB in the beginning and 184.7MB in the end (delta: -101.0MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2023-11-26 12:01:24,276 INFO L158 Benchmark]: Witness Printer took 109.40ms. Allocated memory is still 293.6MB. Free memory was 184.7MB in the beginning and 180.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 12:01:24,278 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.59ms. Allocated memory is still 138.4MB. Free memory was 107.3MB in the beginning and 97.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.53ms. Allocated memory is still 138.4MB. Free memory was 97.4MB in the beginning and 95.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.26ms. Allocated memory is still 138.4MB. Free memory was 95.9MB in the beginning and 94.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 418.57ms. Allocated memory is still 138.4MB. Free memory was 94.1MB in the beginning and 84.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 31559.52ms. Allocated memory was 138.4MB in the beginning and 293.6MB in the end (delta: 155.2MB). Free memory was 83.7MB in the beginning and 184.7MB in the end (delta: -101.0MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. * Witness Printer took 109.40ms. Allocated memory is still 293.6MB. Free memory was 184.7MB in the beginning and 180.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.5s, OverallIterations: 12, TraceHistogramMax: 12, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 571 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 483 mSDsluCounter, 930 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 807 mSDsCounter, 168 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1226 IncrementalHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 168 mSolverCounterUnsat, 123 mSDtfsCounter, 1226 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1252 GetRequests, 903 SyntacticMatches, 55 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=11, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 24.9s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 1386 ConstructedInterpolants, 0 QuantifiedInterpolants, 3846 SizeOfPredicates, 66 NumberOfNonLiveVariables, 1386 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 2200/4378 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-26 12:01:24,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a0a177c-4ac0-4e34-8030-5c67693c0fa3/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 Writing output log to file Ultimate.log Result: TRUE