./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/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_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/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_bb51917f-3810-488d-a7d3-7e22e5be483a/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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:41,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:41,893 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:46:41,902 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:41,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:41,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:41,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:41,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:41,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:41,955 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:41,956 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:41,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:41,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:41,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:41,960 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:41,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:41,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:46:41,962 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:41,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:41,963 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:41,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:41,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:46:41,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:41,965 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:46:41,967 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:41,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:46:41,968 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:41,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:41,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:41,971 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:41,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:41,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:41,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:41,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:41,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:46:41,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:41,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:41,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:41,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:41,975 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:46:41,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:41,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:41,977 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_bb51917f-3810-488d-a7d3-7e22e5be483a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2023-11-26 10:46:42,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:42,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:42,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:42,363 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:42,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:42,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-crafted/zero_sum1.c [2023-11-26 10:46:45,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:45,813 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:45,815 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/sv-benchmarks/c/array-crafted/zero_sum1.c [2023-11-26 10:46:45,824 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/data/af6ca47fc/dd6b8670f97f43f4a30411cc4549d99b/FLAGcf41dba4d [2023-11-26 10:46:45,841 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/data/af6ca47fc/dd6b8670f97f43f4a30411cc4549d99b [2023-11-26 10:46:45,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:45,848 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:45,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:45,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:45,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:45,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:45" (1/1) ... [2023-11-26 10:46:45,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f363eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:45, skipping insertion in model container [2023-11-26 10:46:45,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:45" (1/1) ... [2023-11-26 10:46:45,884 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:46,075 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_bb51917f-3810-488d-a7d3-7e22e5be483a/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2023-11-26 10:46:46,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:46,112 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:46,127 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_bb51917f-3810-488d-a7d3-7e22e5be483a/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2023-11-26 10:46:46,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:46,155 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:46,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46 WrapperNode [2023-11-26 10:46:46,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:46,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:46,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:46,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:46,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,194 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-26 10:46:46,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:46,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:46,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:46,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:46,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,223 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-26 10:46:46,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:46,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:46,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:46,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:46,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (1/1) ... [2023-11-26 10:46:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:46,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:46,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:46,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:46:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:46:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:46:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:46:46,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:46:46,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:46,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:46:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:46:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:46:46,417 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:46,420 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:46,588 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:46,624 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:46,625 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:46:46,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:46 BoogieIcfgContainer [2023-11-26 10:46:46,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:46,628 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:46,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:46,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:46,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:45" (1/3) ... [2023-11-26 10:46:46,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7806c3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:46, skipping insertion in model container [2023-11-26 10:46:46,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:46" (2/3) ... [2023-11-26 10:46:46,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7806c3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:46, skipping insertion in model container [2023-11-26 10:46:46,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:46" (3/3) ... [2023-11-26 10:46:46,636 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2023-11-26 10:46:46,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:46,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:46:46,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:46,726 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;@433ab0ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:46,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:46:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:46:46,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:46,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:46,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:46,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1762294231, now seen corresponding path program 1 times [2023-11-26 10:46:46,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:46,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317778029] [2023-11-26 10:46:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:46,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:46,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317778029] [2023-11-26 10:46:46,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317778029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:46,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:46,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:46:46,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762799218] [2023-11-26 10:46:46,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:46,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:46:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:46:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:46:46,984 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:47,046 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2023-11-26 10:46:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:46:47,051 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:46:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:47,062 INFO L225 Difference]: With dead ends: 25 [2023-11-26 10:46:47,062 INFO L226 Difference]: Without dead ends: 11 [2023-11-26 10:46:47,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:46:47,073 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:47,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-26 10:46:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-26 10:46:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-26 10:46:47,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 10 [2023-11-26 10:46:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:47,112 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-26 10:46:47,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-26 10:46:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:46:47,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:47,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:46:47,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:47,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash -104633187, now seen corresponding path program 1 times [2023-11-26 10:46:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:47,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621623203] [2023-11-26 10:46:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:47,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:47,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621623203] [2023-11-26 10:46:47,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621623203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:47,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:47,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:47,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325730332] [2023-11-26 10:46:47,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:47,281 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:47,306 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-26 10:46:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:46:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:47,331 INFO L225 Difference]: With dead ends: 20 [2023-11-26 10:46:47,331 INFO L226 Difference]: Without dead ends: 12 [2023-11-26 10:46:47,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:47,334 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:47,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-26 10:46:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-26 10:46:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-26 10:46:47,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-11-26 10:46:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:47,341 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-26 10:46:47,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-26 10:46:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:46:47,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:47,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:47,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:46:47,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:47,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash -536743555, now seen corresponding path program 1 times [2023-11-26 10:46:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:47,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627139259] [2023-11-26 10:46:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627139259] [2023-11-26 10:46:47,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627139259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:47,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:47,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:46:47,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281695074] [2023-11-26 10:46:47,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:47,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:47,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:46:47,490 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:47,525 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-26 10:46:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:47,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-26 10:46:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:47,527 INFO L225 Difference]: With dead ends: 20 [2023-11-26 10:46:47,527 INFO L226 Difference]: Without dead ends: 14 [2023-11-26 10:46:47,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:46:47,529 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:47,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-26 10:46:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-26 10:46:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-26 10:46:47,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-11-26 10:46:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:47,536 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-26 10:46:47,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-26 10:46:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:46:47,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:47,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:46:47,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:47,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1915649104, now seen corresponding path program 1 times [2023-11-26 10:46:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:47,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278547558] [2023-11-26 10:46:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:46:47,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278547558] [2023-11-26 10:46:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278547558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:47,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003148157] [2023-11-26 10:46:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:47,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:47,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:47,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:47,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:46:47,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:46:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003148157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:48,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:48,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 10:46:48,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690941673] [2023-11-26 10:46:48,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:48,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:46:48,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:46:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:48,009 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:48,056 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-26 10:46:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-26 10:46:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:48,058 INFO L225 Difference]: With dead ends: 25 [2023-11-26 10:46:48,058 INFO L226 Difference]: Without dead ends: 15 [2023-11-26 10:46:48,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:48,060 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:48,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-26 10:46:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-26 10:46:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-26 10:46:48,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2023-11-26 10:46:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:48,067 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-26 10:46:48,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-26 10:46:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 10:46:48,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:48,069 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:48,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:46:48,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:48,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:48,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash 932662128, now seen corresponding path program 2 times [2023-11-26 10:46:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865305426] [2023-11-26 10:46:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:46:48,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:48,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865305426] [2023-11-26 10:46:48,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865305426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269879455] [2023-11-26 10:46:48,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:48,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:48,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:48,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:48,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:48,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:48,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:48,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:46:48,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:46:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269879455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:48,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:48,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-26 10:46:48,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601458642] [2023-11-26 10:46:48,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:48,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:46:48,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:46:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:46:48,627 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:48,670 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-26 10:46:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 10:46:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:48,671 INFO L225 Difference]: With dead ends: 24 [2023-11-26 10:46:48,671 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 10:46:48,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:46:48,673 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:48,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 10:46:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-26 10:46:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-26 10:46:48,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2023-11-26 10:46:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:48,695 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-26 10:46:48,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-26 10:46:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:46:48,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:48,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:48,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:48,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:48,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:48,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1849724483, now seen corresponding path program 3 times [2023-11-26 10:46:48,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:48,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165194957] [2023-11-26 10:46:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:48,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:49,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165194957] [2023-11-26 10:46:49,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165194957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981085251] [2023-11-26 10:46:49,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:49,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:49,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:49,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:50,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:46:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:50,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 10:46:50,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:50,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:46:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:50,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:46:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981085251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:50,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2023-11-26 10:46:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869634401] [2023-11-26 10:46:50,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:46:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:46:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:46:50,344 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:50,552 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-26 10:46:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:46:50,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:46:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:50,554 INFO L225 Difference]: With dead ends: 26 [2023-11-26 10:46:50,554 INFO L226 Difference]: Without dead ends: 22 [2023-11-26 10:46:50,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:46:50,558 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:50,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-26 10:46:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-26 10:46:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-26 10:46:50,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2023-11-26 10:46:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:50,573 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-26 10:46:50,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-26 10:46:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:46:50,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:50,574 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:50,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 10:46:50,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:50,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:50,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1475451016, now seen corresponding path program 4 times [2023-11-26 10:46:50,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:50,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088443174] [2023-11-26 10:46:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:46:50,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:50,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088443174] [2023-11-26 10:46:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088443174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874759298] [2023-11-26 10:46:50,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:46:50,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:50,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:50,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:50,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:46:50,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:46:50,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:50,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:46:50,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:46:51,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:46:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874759298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:51,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-26 10:46:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151745424] [2023-11-26 10:46:51,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:51,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 10:46:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 10:46:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:46:51,180 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:51,413 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-11-26 10:46:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:46:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-26 10:46:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:51,415 INFO L225 Difference]: With dead ends: 41 [2023-11-26 10:46:51,415 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:46:51,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-11-26 10:46:51,417 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:51,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:46:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-11-26 10:46:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-26 10:46:51,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-11-26 10:46:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:51,425 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-26 10:46:51,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-26 10:46:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:46:51,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:51,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:51,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:51,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:46:51,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:51,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:51,633 INFO L85 PathProgramCache]: Analyzing trace with hash -537919397, now seen corresponding path program 5 times [2023-11-26 10:46:51,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:51,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158908041] [2023-11-26 10:46:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:51,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:51,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158908041] [2023-11-26 10:46:51,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158908041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410927159] [2023-11-26 10:46:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:46:51,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:51,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:51,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:46:51,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 10:46:51,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:51,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:46:51,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:51,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410927159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:51,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-26 10:46:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713835810] [2023-11-26 10:46:51,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:46:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:46:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:51,984 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:52,045 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-11-26 10:46:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:46:52,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-26 10:46:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:52,046 INFO L225 Difference]: With dead ends: 29 [2023-11-26 10:46:52,046 INFO L226 Difference]: Without dead ends: 20 [2023-11-26 10:46:52,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:46:52,048 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:52,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-26 10:46:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-26 10:46:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-26 10:46:52,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2023-11-26 10:46:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:52,055 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-26 10:46:52,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-26 10:46:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:46:52,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:52,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:52,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:52,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:46:52,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:52,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1966217392, now seen corresponding path program 6 times [2023-11-26 10:46:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:52,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77072650] [2023-11-26 10:46:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77072650] [2023-11-26 10:46:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77072650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779669475] [2023-11-26 10:46:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:46:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:53,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:53,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:53,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:46:53,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 10:46:53,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:53,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-26 10:46:53,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:53,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:46:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:53,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779669475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:54,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 30 [2023-11-26 10:46:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592318046] [2023-11-26 10:46:54,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:46:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:46:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:46:54,028 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:54,483 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-26 10:46:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:46:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 10:46:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:54,485 INFO L225 Difference]: With dead ends: 30 [2023-11-26 10:46:54,485 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 10:46:54,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 10:46:54,486 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:54,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:46:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 10:46:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-26 10:46:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-26 10:46:54,497 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2023-11-26 10:46:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:54,498 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-26 10:46:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-26 10:46:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:46:54,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:54,500 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:54,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:46:54,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:46:54,706 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:54,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2009920773, now seen corresponding path program 7 times [2023-11-26 10:46:54,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:54,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472036159] [2023-11-26 10:46:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:54,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472036159] [2023-11-26 10:46:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472036159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379734026] [2023-11-26 10:46:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:46:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:54,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:54,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:46:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:54,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:46:54,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:55,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379734026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:55,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-26 10:46:55,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802303125] [2023-11-26 10:46:55,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:55,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:46:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:46:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:46:55,144 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:55,253 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-26 10:46:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:46:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-26 10:46:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:55,254 INFO L225 Difference]: With dead ends: 44 [2023-11-26 10:46:55,254 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:46:55,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:46:55,256 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:55,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:46:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 10:46:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-26 10:46:55,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2023-11-26 10:46:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:55,269 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-26 10:46:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-26 10:46:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:46:55,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:55,270 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:55,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:55,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:46:55,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:55,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1832450011, now seen corresponding path program 8 times [2023-11-26 10:46:55,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:55,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953565299] [2023-11-26 10:46:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:46:55,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:55,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953565299] [2023-11-26 10:46:55,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953565299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:55,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351910372] [2023-11-26 10:46:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:55,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:55,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:55,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:46:55,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:55,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:46:55,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:46:55,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:46:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351910372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:55,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-26 10:46:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001404410] [2023-11-26 10:46:55,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:55,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:46:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:46:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:46:55,975 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:56,090 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-11-26 10:46:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:46:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 10:46:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:56,092 INFO L225 Difference]: With dead ends: 33 [2023-11-26 10:46:56,092 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 10:46:56,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:46:56,093 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:56,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 10:46:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-26 10:46:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-26 10:46:56,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-11-26 10:46:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:56,107 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-26 10:46:56,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-26 10:46:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 10:46:56,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:56,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:56,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:56,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:56,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:56,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 997916381, now seen corresponding path program 9 times [2023-11-26 10:46:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:56,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476507302] [2023-11-26 10:46:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:57,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476507302] [2023-11-26 10:46:57,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476507302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:57,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974903747] [2023-11-26 10:46:57,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:57,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:57,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:57,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:46:57,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:46:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:57,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-26 10:46:57,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:57,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:46:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:58,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:58,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-26 10:46:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:58,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:59,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-11-26 10:46:59,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:59,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2023-11-26 10:46:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:59,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974903747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:59,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:59,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 50 [2023-11-26 10:46:59,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139088926] [2023-11-26 10:46:59,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:59,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-26 10:46:59,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-26 10:46:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2023-11-26 10:46:59,477 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:01,016 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-11-26 10:47:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-26 10:47:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-26 10:47:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:01,020 INFO L225 Difference]: With dead ends: 49 [2023-11-26 10:47:01,020 INFO L226 Difference]: Without dead ends: 43 [2023-11-26 10:47:01,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2023-11-26 10:47:01,024 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:01,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:47:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-26 10:47:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-11-26 10:47:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-26 10:47:01,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2023-11-26 10:47:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:01,037 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-26 10:47:01,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-26 10:47:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:47:01,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:01,038 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:47:01,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:01,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1852895192, now seen corresponding path program 10 times [2023-11-26 10:47:01,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:01,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392128729] [2023-11-26 10:47:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:47:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392128729] [2023-11-26 10:47:01,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392128729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024023378] [2023-11-26 10:47:01,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:47:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:01,447 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:01,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:47:01,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:47:01,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:01,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:47:01,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:47:01,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:47:01,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024023378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:01,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:01,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-11-26 10:47:01,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119774172] [2023-11-26 10:47:01,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:01,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:47:01,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:47:01,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:47:01,916 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:02,293 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-11-26 10:47:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 10:47:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:47:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:02,295 INFO L225 Difference]: With dead ends: 55 [2023-11-26 10:47:02,295 INFO L226 Difference]: Without dead ends: 32 [2023-11-26 10:47:02,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 10:47:02,297 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:02,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-26 10:47:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-11-26 10:47:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-11-26 10:47:02,313 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2023-11-26 10:47:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:02,313 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-11-26 10:47:02,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-11-26 10:47:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:47:02,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:02,317 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:02,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:02,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:47:02,521 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:02,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash -503169221, now seen corresponding path program 11 times [2023-11-26 10:47:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:02,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594970091] [2023-11-26 10:47:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:02,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594970091] [2023-11-26 10:47:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594970091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:02,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325404613] [2023-11-26 10:47:02,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:47:02,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:02,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:02,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:02,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:47:02,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-26 10:47:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:02,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:47:02,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:03,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:03,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325404613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:03,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:03,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-11-26 10:47:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570104025] [2023-11-26 10:47:03,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:47:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:47:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:47:03,237 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:03,491 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-11-26 10:47:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:47:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-26 10:47:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:03,493 INFO L225 Difference]: With dead ends: 37 [2023-11-26 10:47:03,493 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 10:47:03,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 10:47:03,496 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:03,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 50 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 10:47:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-26 10:47:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-26 10:47:03,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2023-11-26 10:47:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:03,527 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-26 10:47:03,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-26 10:47:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:47:03,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:03,534 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:03,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:03,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:47:03,741 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:03,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2039714544, now seen corresponding path program 12 times [2023-11-26 10:47:03,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702106301] [2023-11-26 10:47:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:05,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702106301] [2023-11-26 10:47:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702106301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501448884] [2023-11-26 10:47:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:47:05,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:05,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:05,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:47:05,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-26 10:47:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:05,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-26 10:47:05,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:06,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:06,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-26 10:47:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:47:06,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:07,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:07,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2023-11-26 10:47:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:47:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501448884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:08,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:08,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 18] total 52 [2023-11-26 10:47:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520582809] [2023-11-26 10:47:08,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:08,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-26 10:47:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-26 10:47:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2466, Unknown=0, NotChecked=0, Total=2652 [2023-11-26 10:47:08,251 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:10,101 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-11-26 10:47:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 10:47:10,102 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:47:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:10,103 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:47:10,103 INFO L226 Difference]: Without dead ends: 34 [2023-11-26 10:47:10,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=355, Invalid=4757, Unknown=0, NotChecked=0, Total=5112 [2023-11-26 10:47:10,106 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:10,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:47:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-26 10:47:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-11-26 10:47:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-26 10:47:10,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2023-11-26 10:47:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:10,124 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-26 10:47:10,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-26 10:47:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:47:10,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:10,125 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:10,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:47:10,332 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:10,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1866987995, now seen corresponding path program 13 times [2023-11-26 10:47:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:10,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594031834] [2023-11-26 10:47:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:10,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:10,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:10,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594031834] [2023-11-26 10:47:10,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594031834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868021214] [2023-11-26 10:47:10,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:47:10,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:10,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:10,562 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:10,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:47:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:10,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:47:10,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:10,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:10,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868021214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:10,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:10,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-26 10:47:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768042302] [2023-11-26 10:47:10,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:47:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:47:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:47:10,959 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:11,079 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-26 10:47:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:47:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-26 10:47:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:11,080 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:47:11,080 INFO L226 Difference]: Without dead ends: 30 [2023-11-26 10:47:11,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:47:11,082 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:11,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-26 10:47:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-26 10:47:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-26 10:47:11,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 26 [2023-11-26 10:47:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:11,105 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-26 10:47:11,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-26 10:47:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:47:11,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:11,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:11,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:47:11,313 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:11,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1151385275, now seen corresponding path program 14 times [2023-11-26 10:47:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:11,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800915693] [2023-11-26 10:47:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800915693] [2023-11-26 10:47:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800915693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782840768] [2023-11-26 10:47:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:11,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:11,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:11,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:47:11,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:11,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:47:11,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:11,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:11,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782840768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:11,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:11,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-26 10:47:11,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686299542] [2023-11-26 10:47:11,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:11,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:47:11,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:47:11,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:47:11,929 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:12,039 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-11-26 10:47:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:47:12,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 10:47:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:12,041 INFO L225 Difference]: With dead ends: 41 [2023-11-26 10:47:12,041 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 10:47:12,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:47:12,042 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:12,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 10:47:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-26 10:47:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-26 10:47:12,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2023-11-26 10:47:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:12,060 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-26 10:47:12,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-26 10:47:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 10:47:12,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:12,061 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:12,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:12,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:47:12,267 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:12,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1359746045, now seen corresponding path program 15 times [2023-11-26 10:47:12,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:12,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795600778] [2023-11-26 10:47:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:14,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:14,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795600778] [2023-11-26 10:47:14,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795600778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:14,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139246132] [2023-11-26 10:47:14,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:47:14,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:14,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:14,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:47:14,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 10:47:14,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:14,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-26 10:47:14,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:16,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:16,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-26 10:47:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:16,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:17,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:17,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2023-11-26 10:47:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:47:18,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139246132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:18,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:18,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 20] total 59 [2023-11-26 10:47:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547669086] [2023-11-26 10:47:18,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:18,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-26 10:47:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-26 10:47:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3111, Unknown=1, NotChecked=0, Total=3422 [2023-11-26 10:47:18,576 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:21,563 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-11-26 10:47:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 10:47:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-26 10:47:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:21,564 INFO L225 Difference]: With dead ends: 61 [2023-11-26 10:47:21,564 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 10:47:21,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=601, Invalid=6204, Unknown=1, NotChecked=0, Total=6806 [2023-11-26 10:47:21,567 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:21,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 10:47:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 10:47:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2023-11-26 10:47:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-11-26 10:47:21,587 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2023-11-26 10:47:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:21,588 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-11-26 10:47:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-11-26 10:47:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:47:21,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:21,589 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:21,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:47:21,794 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:21,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2108870600, now seen corresponding path program 16 times [2023-11-26 10:47:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:21,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146093022] [2023-11-26 10:47:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:22,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:22,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146093022] [2023-11-26 10:47:22,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146093022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:22,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135509343] [2023-11-26 10:47:22,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:47:22,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:22,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:22,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:22,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 10:47:22,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:47:22,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:22,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:47:22,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:22,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:22,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135509343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:22,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-11-26 10:47:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123931353] [2023-11-26 10:47:22,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:22,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-26 10:47:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-26 10:47:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2023-11-26 10:47:22,700 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,231 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-11-26 10:47:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 10:47:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-26 10:47:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,232 INFO L225 Difference]: With dead ends: 69 [2023-11-26 10:47:23,233 INFO L226 Difference]: Without dead ends: 40 [2023-11-26 10:47:23,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2023-11-26 10:47:23,235 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 48 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:47:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-26 10:47:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2023-11-26 10:47:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-11-26 10:47:23,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2023-11-26 10:47:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,254 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-11-26 10:47:23,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-11-26 10:47:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 10:47:23,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,255 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:23,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:23,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:23,456 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash 926021147, now seen corresponding path program 17 times [2023-11-26 10:47:23,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24581259] [2023-11-26 10:47:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-26 10:47:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24581259] [2023-11-26 10:47:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24581259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637837513] [2023-11-26 10:47:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:47:23,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:23,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:23,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 10:47:23,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-26 10:47:23,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:23,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:47:23,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-26 10:47:24,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-26 10:47:24,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637837513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:24,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:24,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-26 10:47:24,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802958260] [2023-11-26 10:47:24,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:24,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:47:24,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:24,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:47:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:47:24,169 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:24,295 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2023-11-26 10:47:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:47:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-26 10:47:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:24,314 INFO L225 Difference]: With dead ends: 45 [2023-11-26 10:47:24,314 INFO L226 Difference]: Without dead ends: 32 [2023-11-26 10:47:24,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:47:24,316 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:24,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-26 10:47:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-26 10:47:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-26 10:47:24,352 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2023-11-26 10:47:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:24,352 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-26 10:47:24,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-26 10:47:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 10:47:24,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:24,353 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:24,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:24,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:24,561 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:24,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2045213040, now seen corresponding path program 18 times [2023-11-26 10:47:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:24,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425430220] [2023-11-26 10:47:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425430220] [2023-11-26 10:47:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425430220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013445225] [2023-11-26 10:47:26,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:47:26,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:26,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:26,552 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:26,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb51917f-3810-488d-a7d3-7e22e5be483a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 10:47:26,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-26 10:47:26,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:26,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-26 10:47:26,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:26,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:47:28,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:28,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-26 10:47:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:28,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:30,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2023-11-26 10:47:30,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:30,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 922 treesize of output 474 [2023-11-26 10:47:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:31,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013445225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:31,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:31,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 75 [2023-11-26 10:47:31,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108391525] [2023-11-26 10:47:31,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:31,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-26 10:47:31,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-26 10:47:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=5156, Unknown=0, NotChecked=0, Total=5550 [2023-11-26 10:47:31,379 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 75 states have internal predecessors, (81), 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)