./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/half_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:38:03,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:38:03,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:38:03,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:38:03,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:38:03,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:38:03,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:38:03,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:38:03,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:38:03,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:38:03,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:38:03,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:38:03,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:38:03,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:38:03,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:38:03,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:38:03,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:38:03,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:38:03,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:38:03,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:38:03,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:38:03,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:38:03,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:38:03,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:38:03,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:38:03,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:38:03,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:38:03,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:38:03,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:38:03,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:38:03,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:38:03,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:38:03,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:38:03,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:38:03,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:38:03,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:38:03,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:38:03,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:38:03,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:38:03,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:38:03,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:38:03,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:38:03,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:38:03,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:38:03,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:38:03,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:38:03,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:38:03,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:38:03,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:38:03,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:38:03,097 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:38:03,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:38:03,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:38:03,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:38:03,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:38:03,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:38:03,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:38:03,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:38:03,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:38:03,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:38:03,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:38:03,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:38:03,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:38:03,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:38:03,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:38:03,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:38:03,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:38:03,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:38:03,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:38:03,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:38:03,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:38:03,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:38:03,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:38:03,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:38:03,100 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:38:03,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:38:03,101 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:38:03,101 INFO L138 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_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2022-12-13 11:38:03,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:38:03,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:38:03,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:38:03,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:38:03,305 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:38:03,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loop-invgen/half_2.i [2022-12-13 11:38:05,906 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:38:06,036 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:38:06,037 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/sv-benchmarks/c/loop-invgen/half_2.i [2022-12-13 11:38:06,041 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/data/d7ec4a087/cf5067d313894fbd84b81afb8859880a/FLAG75d6ab605 [2022-12-13 11:38:06,051 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/data/d7ec4a087/cf5067d313894fbd84b81afb8859880a [2022-12-13 11:38:06,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:38:06,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:38:06,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:38:06,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:38:06,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:38:06,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6591a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06, skipping insertion in model container [2022-12-13 11:38:06,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:38:06,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:38:06,186 WARN L237 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_ffec267c-20ed-4acd-9a2e-ba9992750eb5/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2022-12-13 11:38:06,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:38:06,201 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:38:06,210 WARN L237 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_ffec267c-20ed-4acd-9a2e-ba9992750eb5/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2022-12-13 11:38:06,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:38:06,222 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:38:06,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06 WrapperNode [2022-12-13 11:38:06,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:38:06,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:38:06,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:38:06,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:38:06,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,246 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-12-13 11:38:06,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:38:06,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:38:06,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:38:06,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:38:06,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:38:06,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:38:06,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:38:06,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:38:06,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (1/1) ... [2022-12-13 11:38:06,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:38:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:06,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:38:06,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:38:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:38:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:38:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:38:06,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:38:06,375 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:38:06,377 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:38:06,447 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:38:06,452 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:38:06,452 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 11:38:06,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:38:06 BoogieIcfgContainer [2022-12-13 11:38:06,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:38:06,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:38:06,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:38:06,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:38:06,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:38:06" (1/3) ... [2022-12-13 11:38:06,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f596a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:38:06, skipping insertion in model container [2022-12-13 11:38:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:38:06" (2/3) ... [2022-12-13 11:38:06,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f596a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:38:06, skipping insertion in model container [2022-12-13 11:38:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:38:06" (3/3) ... [2022-12-13 11:38:06,460 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2022-12-13 11:38:06,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:38:06,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:38:06,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:38:06,518 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=LoopsAndPotentialCycles, 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;@25594ec6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:38:06,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:38:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) [2022-12-13 11:38:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 11:38:06,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:06,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:06,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2022-12-13 11:38:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035437047] [2022-12-13 11:38:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:06,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:06,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035437047] [2022-12-13 11:38:06,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035437047] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:38:06,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:38:06,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:38:06,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810021850] [2022-12-13 11:38:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:38:06,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:38:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:06,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:38:06,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:38:06,693 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:06,707 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-12-13 11:38:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:38:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 11:38:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:06,717 INFO L225 Difference]: With dead ends: 24 [2022-12-13 11:38:06,717 INFO L226 Difference]: Without dead ends: 10 [2022-12-13 11:38:06,720 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 [2022-12-13 11:38:06,723 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:06,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:38:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-13 11:38:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-13 11:38:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-12-13 11:38:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-13 11:38:06,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-12-13 11:38:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:06,755 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-13 11:38:06,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-13 11:38:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 11:38:06,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:06,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:06,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:38:06,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2022-12-13 11:38:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539804064] [2022-12-13 11:38:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:06,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539804064] [2022-12-13 11:38:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539804064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:38:06,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:38:06,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:38:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450896458] [2022-12-13 11:38:06,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:38:06,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:38:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:38:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:38:06,966 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:07,011 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-12-13 11:38:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:38:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 11:38:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:07,012 INFO L225 Difference]: With dead ends: 18 [2022-12-13 11:38:07,012 INFO L226 Difference]: Without dead ends: 16 [2022-12-13 11:38:07,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:38:07,013 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:07,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:38:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-13 11:38:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-12-13 11:38:07,017 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) [2022-12-13 11:38:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-13 11:38:07,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-13 11:38:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:07,017 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-13 11:38:07,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-13 11:38:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 11:38:07,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:07,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:07,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:38:07,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2022-12-13 11:38:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481450258] [2022-12-13 11:38:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:07,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:07,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481450258] [2022-12-13 11:38:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481450258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:07,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358010349] [2022-12-13 11:38:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:07,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:07,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:07,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:07,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:38:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:38:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:07,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:07,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358010349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:07,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:07,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 11:38:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610034730] [2022-12-13 11:38:07,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:38:07,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:38:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:38:07,476 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-13 11:38:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:07,826 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-12-13 11:38:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:38:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) Word has length 9 [2022-12-13 11:38:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:07,827 INFO L225 Difference]: With dead ends: 41 [2022-12-13 11:38:07,827 INFO L226 Difference]: Without dead ends: 39 [2022-12-13 11:38:07,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:38:07,830 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:07,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:38:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-13 11:38:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-12-13 11:38:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2022-12-13 11:38:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-12-13 11:38:07,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-12-13 11:38:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:07,838 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-12-13 11:38:07,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-13 11:38:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-12-13 11:38:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 11:38:07,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:07,839 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:07,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:38:08,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:08,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 2 times [2022-12-13 11:38:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521298510] [2022-12-13 11:38:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:08,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:08,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521298510] [2022-12-13 11:38:08,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521298510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:08,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919287171] [2022-12-13 11:38:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:38:08,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:08,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:08,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:38:08,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:38:08,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:38:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:08,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:08,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919287171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:08,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:08,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 11:38:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712143279] [2022-12-13 11:38:08,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:08,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:38:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:38:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:38:08,391 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-12-13 11:38:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:08,631 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-12-13 11:38:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:38:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11 [2022-12-13 11:38:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:08,633 INFO L225 Difference]: With dead ends: 51 [2022-12-13 11:38:08,633 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 11:38:08,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-12-13 11:38:08,635 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:08,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 85 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:38:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 11:38:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 19. [2022-12-13 11:38:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2022-12-13 11:38:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-12-13 11:38:08,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2022-12-13 11:38:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:08,651 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-12-13 11:38:08,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-12-13 11:38:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-12-13 11:38:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 11:38:08,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:08,652 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:08,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:38:08,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:08,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2022-12-13 11:38:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:08,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579117903] [2022-12-13 11:38:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:08,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579117903] [2022-12-13 11:38:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579117903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408047686] [2022-12-13 11:38:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:08,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:08,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:08,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:38:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:08,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:38:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:09,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:38:09,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408047686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:38:09,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:38:09,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-12-13 11:38:09,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631570739] [2022-12-13 11:38:09,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:38:09,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:38:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:38:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:38:09,011 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2022-12-13 11:38:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:09,040 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-12-13 11:38:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:38:09,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2022-12-13 11:38:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:09,041 INFO L225 Difference]: With dead ends: 27 [2022-12-13 11:38:09,041 INFO L226 Difference]: Without dead ends: 19 [2022-12-13 11:38:09,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:38:09,042 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:09,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:38:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-13 11:38:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-13 11:38:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2022-12-13 11:38:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-13 11:38:09,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-12-13 11:38:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:09,049 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-13 11:38:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2022-12-13 11:38:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-13 11:38:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 11:38:09,050 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:09,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:09,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:38:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:09,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 1 times [2022-12-13 11:38:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:09,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866772366] [2022-12-13 11:38:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:09,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:09,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866772366] [2022-12-13 11:38:09,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866772366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402676307] [2022-12-13 11:38:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:09,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:09,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:09,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:38:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:38:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:09,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402676307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:09,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:09,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 11:38:09,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359420834] [2022-12-13 11:38:09,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:09,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:38:09,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:38:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:38:09,758 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2022-12-13 11:38:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:10,244 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-12-13 11:38:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:38:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 [2022-12-13 11:38:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:10,244 INFO L225 Difference]: With dead ends: 47 [2022-12-13 11:38:10,244 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 11:38:10,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 11:38:10,245 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:10,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:38:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 11:38:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2022-12-13 11:38:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2022-12-13 11:38:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-13 11:38:10,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-12-13 11:38:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:10,250 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-13 11:38:10,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2022-12-13 11:38:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-13 11:38:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 11:38:10,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:10,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:10,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:38:10,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:38:10,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 2 times [2022-12-13 11:38:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:10,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12711958] [2022-12-13 11:38:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:10,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:10,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12711958] [2022-12-13 11:38:10,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12711958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:10,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276833803] [2022-12-13 11:38:10,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:38:10,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:10,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:10,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:10,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:38:10,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:38:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:38:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:11,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276833803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:11,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:11,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-12-13 11:38:11,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310393816] [2022-12-13 11:38:11,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:11,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:38:11,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:38:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:38:11,112 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-12-13 11:38:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:11,704 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-12-13 11:38:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:38:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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 17 [2022-12-13 11:38:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:11,705 INFO L225 Difference]: With dead ends: 49 [2022-12-13 11:38:11,705 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 11:38:11,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 11:38:11,706 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:11,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:38:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 11:38:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-12-13 11:38:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-12-13 11:38:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-13 11:38:11,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-12-13 11:38:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:11,714 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-13 11:38:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-12-13 11:38:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-13 11:38:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 11:38:11,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:11,714 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:11,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 11:38:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 11:38:11,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash 38169965, now seen corresponding path program 3 times [2022-12-13 11:38:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:11,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060735688] [2022-12-13 11:38:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:12,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060735688] [2022-12-13 11:38:12,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060735688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739263431] [2022-12-13 11:38:12,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:38:12,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:12,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:12,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:12,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:38:12,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 11:38:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:12,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:38:12,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:12,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:12,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739263431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:12,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:12,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-12-13 11:38:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314459723] [2022-12-13 11:38:12,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:12,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:38:12,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:38:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:38:12,351 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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) [2022-12-13 11:38:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:12,756 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-12-13 11:38:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:38:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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 [2022-12-13 11:38:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:12,758 INFO L225 Difference]: With dead ends: 82 [2022-12-13 11:38:12,758 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 11:38:12,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=750, Invalid=2220, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 11:38:12,760 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 121 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:12,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 105 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:38:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 11:38:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2022-12-13 11:38:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2022-12-13 11:38:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-13 11:38:12,772 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-12-13 11:38:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:12,772 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-13 11:38:12,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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) [2022-12-13 11:38:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-13 11:38:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 11:38:12,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:12,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:12,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 11:38:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:12,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 4 times [2022-12-13 11:38:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:12,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523184547] [2022-12-13 11:38:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:13,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523184547] [2022-12-13 11:38:13,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523184547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:13,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524590064] [2022-12-13 11:38:13,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:38:13,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:13,283 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:13,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:38:13,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:38:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:38:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:13,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524590064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:13,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-12-13 11:38:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391225417] [2022-12-13 11:38:13,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:13,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 11:38:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:13,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 11:38:13,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-12-13 11:38:13,848 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2022-12-13 11:38:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:14,268 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-12-13 11:38:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:38:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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 21 [2022-12-13 11:38:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:14,269 INFO L225 Difference]: With dead ends: 56 [2022-12-13 11:38:14,269 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 11:38:14,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 11:38:14,269 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:14,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:38:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 11:38:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-12-13 11:38:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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) [2022-12-13 11:38:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-12-13 11:38:14,284 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2022-12-13 11:38:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:14,284 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-12-13 11:38:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2022-12-13 11:38:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-12-13 11:38:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 11:38:14,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:14,285 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:14,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:38:14,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:14,486 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 5 times [2022-12-13 11:38:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406915280] [2022-12-13 11:38:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:14,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:14,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406915280] [2022-12-13 11:38:14,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406915280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:14,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749045883] [2022-12-13 11:38:14,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:38:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:14,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:14,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:14,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:38:14,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 11:38:14,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 11:38:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:15,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:15,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749045883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:15,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:15,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2022-12-13 11:38:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051833087] [2022-12-13 11:38:15,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 11:38:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 11:38:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 11:38:15,661 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 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) [2022-12-13 11:38:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:16,828 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-12-13 11:38:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 11:38:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 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 [2022-12-13 11:38:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:16,830 INFO L225 Difference]: With dead ends: 93 [2022-12-13 11:38:16,830 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 11:38:16,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=604, Invalid=3056, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 11:38:16,831 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:16,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 87 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:38:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 11:38:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2022-12-13 11:38:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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) [2022-12-13 11:38:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-12-13 11:38:16,844 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2022-12-13 11:38:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:16,844 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-12-13 11:38:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 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) [2022-12-13 11:38:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-12-13 11:38:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 11:38:16,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:16,845 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:16,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:38:17,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:38:17,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 6 times [2022-12-13 11:38:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:17,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016900335] [2022-12-13 11:38:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:17,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:17,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:17,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016900335] [2022-12-13 11:38:17,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016900335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:17,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958809883] [2022-12-13 11:38:17,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:38:17,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:17,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:17,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:17,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:38:17,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 11:38:17,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 11:38:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:17,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:18,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958809883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:18,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:18,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-12-13 11:38:18,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378084346] [2022-12-13 11:38:18,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:18,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 11:38:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 11:38:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 11:38:18,662 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 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) [2022-12-13 11:38:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:19,577 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-12-13 11:38:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:38:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 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 [2022-12-13 11:38:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:19,578 INFO L225 Difference]: With dead ends: 60 [2022-12-13 11:38:19,578 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 11:38:19,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=562, Invalid=3598, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 11:38:19,580 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:19,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 93 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:38:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 11:38:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-12-13 11:38:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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) [2022-12-13 11:38:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-13 11:38:19,594 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-12-13 11:38:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:19,594 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-13 11:38:19,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 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) [2022-12-13 11:38:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-13 11:38:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 11:38:19,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:19,595 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:19,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:38:19,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:19,797 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 7 times [2022-12-13 11:38:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:19,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773151471] [2022-12-13 11:38:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773151471] [2022-12-13 11:38:20,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773151471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12476204] [2022-12-13 11:38:20,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:38:20,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:20,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:20,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:38:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 11:38:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:21,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12476204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:21,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:21,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-12-13 11:38:21,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604788526] [2022-12-13 11:38:21,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:21,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 11:38:21,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 11:38:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 11:38:21,182 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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) [2022-12-13 11:38:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:22,904 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-12-13 11:38:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 11:38:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 33 [2022-12-13 11:38:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:22,905 INFO L225 Difference]: With dead ends: 93 [2022-12-13 11:38:22,905 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 11:38:22,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 11:38:22,907 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:22,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 120 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:38:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 11:38:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-12-13 11:38:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 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) [2022-12-13 11:38:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-12-13 11:38:22,932 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 33 [2022-12-13 11:38:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:22,932 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-12-13 11:38:22,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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) [2022-12-13 11:38:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-12-13 11:38:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 11:38:22,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:22,933 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:22,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:38:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:38:23,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 8 times [2022-12-13 11:38:23,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:23,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69591470] [2022-12-13 11:38:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:23,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:23,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:23,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69591470] [2022-12-13 11:38:23,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69591470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:23,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349397818] [2022-12-13 11:38:23,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:38:23,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:23,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:23,638 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:38:23,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:38:23,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 11:38:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:23,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:24,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349397818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:24,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:24,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-12-13 11:38:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160243473] [2022-12-13 11:38:24,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:24,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 11:38:24,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 11:38:24,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 11:38:24,724 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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) [2022-12-13 11:38:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:26,656 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-12-13 11:38:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 11:38:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 37 [2022-12-13 11:38:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:26,657 INFO L225 Difference]: With dead ends: 124 [2022-12-13 11:38:26,657 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 11:38:26,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1097, Invalid=6213, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 11:38:26,659 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 164 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:26,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 141 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:38:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 11:38:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-12-13 11:38:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-12-13 11:38:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-12-13 11:38:26,704 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2022-12-13 11:38:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:26,704 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-12-13 11:38:26,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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) [2022-12-13 11:38:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-12-13 11:38:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 11:38:26,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:26,705 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:26,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:38:26,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:38:26,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash -826667923, now seen corresponding path program 9 times [2022-12-13 11:38:26,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:26,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133992396] [2022-12-13 11:38:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:27,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:27,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133992396] [2022-12-13 11:38:27,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133992396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:27,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54177097] [2022-12-13 11:38:27,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:38:27,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:27,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:27,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:27,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:38:27,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 11:38:27,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 11:38:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:27,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:27,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54177097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:27,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:27,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-12-13 11:38:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966961690] [2022-12-13 11:38:27,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 11:38:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 11:38:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 11:38:27,918 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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) [2022-12-13 11:38:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:29,144 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2022-12-13 11:38:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 11:38:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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 41 [2022-12-13 11:38:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:29,147 INFO L225 Difference]: With dead ends: 266 [2022-12-13 11:38:29,147 INFO L226 Difference]: Without dead ends: 264 [2022-12-13 11:38:29,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3111, Invalid=9771, Unknown=0, NotChecked=0, Total=12882 [2022-12-13 11:38:29,153 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 299 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:29,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 210 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:38:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-13 11:38:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 72. [2022-12-13 11:38:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 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) [2022-12-13 11:38:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-12-13 11:38:29,198 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2022-12-13 11:38:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:29,198 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-12-13 11:38:29,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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) [2022-12-13 11:38:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-12-13 11:38:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 11:38:29,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:29,200 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:29,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:38:29,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:29,401 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 10 times [2022-12-13 11:38:29,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:29,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926071478] [2022-12-13 11:38:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:29,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:29,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926071478] [2022-12-13 11:38:29,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926071478] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992293062] [2022-12-13 11:38:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:38:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:29,919 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:29,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:38:29,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:38:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 11:38:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:30,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:31,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992293062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:31,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:31,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 56 [2022-12-13 11:38:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424502673] [2022-12-13 11:38:31,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:31,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 11:38:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 11:38:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 11:38:31,324 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 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) [2022-12-13 11:38:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:34,105 INFO L93 Difference]: Finished difference Result 277 states and 289 transitions. [2022-12-13 11:38:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 11:38:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 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 41 [2022-12-13 11:38:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:34,106 INFO L225 Difference]: With dead ends: 277 [2022-12-13 11:38:34,106 INFO L226 Difference]: Without dead ends: 244 [2022-12-13 11:38:34,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1394, Invalid=7918, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 11:38:34,108 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:34,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 151 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:38:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-13 11:38:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 71. [2022-12-13 11:38:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 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) [2022-12-13 11:38:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-12-13 11:38:34,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 41 [2022-12-13 11:38:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:34,159 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-12-13 11:38:34,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 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) [2022-12-13 11:38:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-12-13 11:38:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 11:38:34,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:34,160 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:34,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 11:38:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:34,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:34,362 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 11 times [2022-12-13 11:38:34,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862962894] [2022-12-13 11:38:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:35,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:35,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862962894] [2022-12-13 11:38:35,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862962894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:35,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43648103] [2022-12-13 11:38:35,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:38:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:35,071 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:35,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:38:35,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 11:38:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 11:38:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:35,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:36,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43648103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:36,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:36,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 61 [2022-12-13 11:38:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860926458] [2022-12-13 11:38:36,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 11:38:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 11:38:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 11:38:36,680 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 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) [2022-12-13 11:38:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:40,181 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2022-12-13 11:38:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 11:38:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 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 45 [2022-12-13 11:38:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:40,182 INFO L225 Difference]: With dead ends: 268 [2022-12-13 11:38:40,182 INFO L226 Difference]: Without dead ends: 232 [2022-12-13 11:38:40,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1644, Invalid=9486, Unknown=0, NotChecked=0, Total=11130 [2022-12-13 11:38:40,184 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:40,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 192 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:38:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-12-13 11:38:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 70. [2022-12-13 11:38:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 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) [2022-12-13 11:38:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-12-13 11:38:40,234 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 45 [2022-12-13 11:38:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:40,234 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-12-13 11:38:40,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 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) [2022-12-13 11:38:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-12-13 11:38:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 11:38:40,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:40,234 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:40,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 11:38:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:38:40,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 12 times [2022-12-13 11:38:40,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:40,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077607707] [2022-12-13 11:38:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:40,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:41,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077607707] [2022-12-13 11:38:41,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077607707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069918986] [2022-12-13 11:38:41,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:38:41,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:41,120 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:41,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:38:41,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-12-13 11:38:41,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 11:38:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:41,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:43,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069918986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:43,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:43,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 78 [2022-12-13 11:38:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199864077] [2022-12-13 11:38:43,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 11:38:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 11:38:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=5264, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 11:38:43,262 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 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) [2022-12-13 11:38:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:45,921 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-12-13 11:38:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:38:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 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 49 [2022-12-13 11:38:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:45,923 INFO L225 Difference]: With dead ends: 117 [2022-12-13 11:38:45,923 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 11:38:45,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1364, Invalid=9766, Unknown=0, NotChecked=0, Total=11130 [2022-12-13 11:38:45,924 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:45,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 100 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:38:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 11:38:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2022-12-13 11:38:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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) [2022-12-13 11:38:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-12-13 11:38:45,974 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2022-12-13 11:38:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:45,974 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-12-13 11:38:45,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 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) [2022-12-13 11:38:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-12-13 11:38:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 11:38:45,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:45,975 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:45,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 11:38:46,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:38:46,177 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 13 times [2022-12-13 11:38:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:46,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65263024] [2022-12-13 11:38:46,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:46,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65263024] [2022-12-13 11:38:47,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65263024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389033143] [2022-12-13 11:38:47,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:38:47,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:47,211 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:47,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:38:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:47,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 11:38:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389033143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:49,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:49,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-12-13 11:38:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814180144] [2022-12-13 11:38:49,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:49,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 11:38:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 11:38:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 11:38:49,373 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 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) [2022-12-13 11:38:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:38:53,814 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2022-12-13 11:38:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 11:38:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 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 53 [2022-12-13 11:38:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:38:53,815 INFO L225 Difference]: With dead ends: 232 [2022-12-13 11:38:53,815 INFO L226 Difference]: Without dead ends: 190 [2022-12-13 11:38:53,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3801 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2115, Invalid=12647, Unknown=0, NotChecked=0, Total=14762 [2022-12-13 11:38:53,817 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 261 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 11:38:53,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 229 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 11:38:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-13 11:38:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 68. [2022-12-13 11:38:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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) [2022-12-13 11:38:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-12-13 11:38:53,874 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 53 [2022-12-13 11:38:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:38:53,874 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-12-13 11:38:53,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 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) [2022-12-13 11:38:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-12-13 11:38:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 11:38:53,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:38:53,875 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:38:53,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:38:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:38:54,076 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:38:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 14 times [2022-12-13 11:38:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:38:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364268771] [2022-12-13 11:38:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:38:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:38:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364268771] [2022-12-13 11:38:55,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364268771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:38:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265829409] [2022-12-13 11:38:55,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:38:55,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:38:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:38:55,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:38:55,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:38:55,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:38:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-13 11:38:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:56,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:58,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265829409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:58,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:38:58,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 89 [2022-12-13 11:38:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108812914] [2022-12-13 11:38:58,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:58,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-12-13 11:38:58,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:38:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-12-13 11:38:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=6762, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 11:38:58,152 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 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) [2022-12-13 11:39:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:03,949 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2022-12-13 11:39:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 11:39:03,950 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 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 57 [2022-12-13 11:39:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:03,950 INFO L225 Difference]: With dead ends: 205 [2022-12-13 11:39:03,950 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 11:39:03,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6748 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3012, Invalid=19040, Unknown=0, NotChecked=0, Total=22052 [2022-12-13 11:39:03,951 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 286 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:03,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 294 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 11:39:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 11:39:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 67. [2022-12-13 11:39:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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) [2022-12-13 11:39:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-12-13 11:39:04,007 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2022-12-13 11:39:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:04,007 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-12-13 11:39:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 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) [2022-12-13 11:39:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-12-13 11:39:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 11:39:04,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:04,008 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:04,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:04,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:04,209 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:04,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:04,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 15 times [2022-12-13 11:39:04,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:04,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851577950] [2022-12-13 11:39:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:04,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851577950] [2022-12-13 11:39:05,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851577950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682139459] [2022-12-13 11:39:05,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:39:05,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:05,198 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:05,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:39:05,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-13 11:39:05,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 11:39:05,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:06,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:08,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682139459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:08,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:08,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 100 [2022-12-13 11:39:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338889842] [2022-12-13 11:39:08,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:08,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-12-13 11:39:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-12-13 11:39:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=8718, Unknown=0, NotChecked=0, Total=9900 [2022-12-13 11:39:08,774 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 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) [2022-12-13 11:39:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:12,943 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-12-13 11:39:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 11:39:12,943 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 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 61 [2022-12-13 11:39:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:12,943 INFO L225 Difference]: With dead ends: 116 [2022-12-13 11:39:12,943 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 11:39:12,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4730 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2173, Invalid=15917, Unknown=0, NotChecked=0, Total=18090 [2022-12-13 11:39:12,944 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:12,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 141 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:39:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 11:39:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-12-13 11:39:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-12-13 11:39:13,002 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2022-12-13 11:39:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:13,003 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-12-13 11:39:13,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 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) [2022-12-13 11:39:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-12-13 11:39:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 11:39:13,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:13,003 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:13,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 11:39:13,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:13,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:13,206 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 16 times [2022-12-13 11:39:13,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:13,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056176719] [2022-12-13 11:39:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:13,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:14,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056176719] [2022-12-13 11:39:14,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056176719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:14,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684394414] [2022-12-13 11:39:14,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:39:14,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:14,393 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:14,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:39:14,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:39:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 11:39:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:15,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684394414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:17,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 86 [2022-12-13 11:39:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730366178] [2022-12-13 11:39:17,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:17,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-13 11:39:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-13 11:39:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6232, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 11:39:17,740 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 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) [2022-12-13 11:39:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:24,227 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2022-12-13 11:39:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-13 11:39:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 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 65 [2022-12-13 11:39:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:24,228 INFO L225 Difference]: With dead ends: 181 [2022-12-13 11:39:24,228 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 11:39:24,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3209, Invalid=19441, Unknown=0, NotChecked=0, Total=22650 [2022-12-13 11:39:24,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 344 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:24,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 340 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 11:39:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 11:39:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2022-12-13 11:39:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 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) [2022-12-13 11:39:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-12-13 11:39:24,323 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 65 [2022-12-13 11:39:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:24,323 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-12-13 11:39:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 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) [2022-12-13 11:39:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-12-13 11:39:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 11:39:24,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:24,324 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:24,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 11:39:24,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:24,525 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 17 times [2022-12-13 11:39:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:24,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800045556] [2022-12-13 11:39:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:25,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:25,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800045556] [2022-12-13 11:39:25,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800045556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:25,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932557976] [2022-12-13 11:39:25,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:39:25,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:25,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:25,770 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:25,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:39:25,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 11:39:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:25,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-13 11:39:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:26,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:28,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932557976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:28,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:28,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 91 [2022-12-13 11:39:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229430766] [2022-12-13 11:39:28,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-13 11:39:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-13 11:39:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=6978, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 11:39:28,958 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 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) [2022-12-13 11:39:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:35,913 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-12-13 11:39:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-13 11:39:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 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 69 [2022-12-13 11:39:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:35,914 INFO L225 Difference]: With dead ends: 236 [2022-12-13 11:39:35,914 INFO L226 Difference]: Without dead ends: 182 [2022-12-13 11:39:35,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6846 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3634, Invalid=22126, Unknown=0, NotChecked=0, Total=25760 [2022-12-13 11:39:35,916 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 375 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 3253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:35,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 450 Invalid, 3253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 11:39:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-13 11:39:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2022-12-13 11:39:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 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) [2022-12-13 11:39:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2022-12-13 11:39:36,100 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 69 [2022-12-13 11:39:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:36,100 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2022-12-13 11:39:36,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 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) [2022-12-13 11:39:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2022-12-13 11:39:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 11:39:36,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:36,101 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:36,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:36,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 11:39:36,303 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 18 times [2022-12-13 11:39:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:36,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540971948] [2022-12-13 11:39:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:36,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:37,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540971948] [2022-12-13 11:39:37,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540971948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639598313] [2022-12-13 11:39:37,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:39:37,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:37,786 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:37,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:39:37,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-12-13 11:39:37,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 11:39:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:39,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:42,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639598313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:42,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:42,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42, 42] total 118 [2022-12-13 11:39:42,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203191920] [2022-12-13 11:39:42,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:42,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-13 11:39:42,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-13 11:39:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=12180, Unknown=0, NotChecked=0, Total=13806 [2022-12-13 11:39:42,299 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 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) [2022-12-13 11:39:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:48,412 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-12-13 11:39:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 11:39:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 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 73 [2022-12-13 11:39:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:48,413 INFO L225 Difference]: With dead ends: 197 [2022-12-13 11:39:48,413 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 11:39:48,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6730 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2952, Invalid=22170, Unknown=0, NotChecked=0, Total=25122 [2022-12-13 11:39:48,414 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:48,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 137 Invalid, 2230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:39:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 11:39:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-12-13 11:39:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 135 states have internal predecessors, (153), 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) [2022-12-13 11:39:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2022-12-13 11:39:48,578 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 73 [2022-12-13 11:39:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:48,578 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2022-12-13 11:39:48,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 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) [2022-12-13 11:39:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2022-12-13 11:39:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 11:39:48,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:48,579 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:48,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:48,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:48,780 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 19 times [2022-12-13 11:39:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:48,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199446967] [2022-12-13 11:39:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:49,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:49,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199446967] [2022-12-13 11:39:49,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199446967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:49,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537487128] [2022-12-13 11:39:49,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:39:49,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:49,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:49,387 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:49,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:39:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 11:39:49,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:49,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:50,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537487128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:50,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:50,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2022-12-13 11:39:50,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215049827] [2022-12-13 11:39:50,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:50,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 11:39:50,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:50,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 11:39:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 11:39:50,603 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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) [2022-12-13 11:39:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:51,785 INFO L93 Difference]: Finished difference Result 194 states and 213 transitions. [2022-12-13 11:39:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 11:39:51,785 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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 74 [2022-12-13 11:39:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:51,786 INFO L225 Difference]: With dead ends: 194 [2022-12-13 11:39:51,786 INFO L226 Difference]: Without dead ends: 192 [2022-12-13 11:39:51,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 94 SyntacticMatches, 17 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3941 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2199, Invalid=10011, Unknown=0, NotChecked=0, Total=12210 [2022-12-13 11:39:51,787 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 314 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:51,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 103 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:39:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-13 11:39:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 78. [2022-12-13 11:39:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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) [2022-12-13 11:39:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-12-13 11:39:51,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-12-13 11:39:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:51,891 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-12-13 11:39:51,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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) [2022-12-13 11:39:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-12-13 11:39:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 11:39:51,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:51,891 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:51,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 11:39:52,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:52,092 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 20 times [2022-12-13 11:39:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654222082] [2022-12-13 11:39:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:53,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:53,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654222082] [2022-12-13 11:39:53,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654222082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:53,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054799872] [2022-12-13 11:39:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:39:53,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:53,610 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:53,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:39:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:39:53,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-13 11:39:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:55,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:58,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054799872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:58,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:58,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 42] total 119 [2022-12-13 11:39:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082008415] [2022-12-13 11:39:58,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-12-13 11:39:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-12-13 11:39:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=12172, Unknown=0, NotChecked=0, Total=14042 [2022-12-13 11:39:58,575 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 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) [2022-12-13 11:40:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:10,039 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-12-13 11:40:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-13 11:40:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 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 77 [2022-12-13 11:40:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:10,041 INFO L225 Difference]: With dead ends: 214 [2022-12-13 11:40:10,041 INFO L226 Difference]: Without dead ends: 154 [2022-12-13 11:40:10,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12268 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=5252, Invalid=34150, Unknown=0, NotChecked=0, Total=39402 [2022-12-13 11:40:10,043 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 430 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 4192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:10,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 500 Invalid, 4192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 11:40:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-13 11:40:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2022-12-13 11:40:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 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) [2022-12-13 11:40:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-12-13 11:40:10,204 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 77 [2022-12-13 11:40:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:10,204 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-12-13 11:40:10,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 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) [2022-12-13 11:40:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-12-13 11:40:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 11:40:10,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:10,205 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:10,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 11:40:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 11:40:10,406 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:10,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 21 times [2022-12-13 11:40:10,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:10,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602934277] [2022-12-13 11:40:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:10,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602934277] [2022-12-13 11:40:11,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602934277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301132705] [2022-12-13 11:40:11,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:40:11,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:11,978 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:11,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 11:40:12,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-13 11:40:12,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-13 11:40:12,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:14,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:17,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301132705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:17,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:40:17,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 46, 46] total 130 [2022-12-13 11:40:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146769919] [2022-12-13 11:40:17,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-12-13 11:40:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-12-13 11:40:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=14813, Unknown=0, NotChecked=0, Total=16770 [2022-12-13 11:40:17,147 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 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) [2022-12-13 11:40:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:24,292 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-12-13 11:40:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 11:40:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 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 81 [2022-12-13 11:40:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:24,293 INFO L225 Difference]: With dead ends: 168 [2022-12-13 11:40:24,293 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 11:40:24,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7998 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3558, Invalid=26892, Unknown=0, NotChecked=0, Total=30450 [2022-12-13 11:40:24,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 135 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:24,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 121 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 11:40:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 11:40:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-12-13 11:40:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 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) [2022-12-13 11:40:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2022-12-13 11:40:24,453 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 81 [2022-12-13 11:40:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:24,453 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2022-12-13 11:40:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 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) [2022-12-13 11:40:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2022-12-13 11:40:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 11:40:24,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:24,453 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:24,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 11:40:24,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 11:40:24,655 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 22 times [2022-12-13 11:40:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:24,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144164901] [2022-12-13 11:40:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 171 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:25,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144164901] [2022-12-13 11:40:25,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144164901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542162060] [2022-12-13 11:40:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:40:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:25,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:25,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 11:40:25,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:40:25,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 11:40:25,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:26,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:26,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542162060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:26,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:40:26,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2022-12-13 11:40:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845486651] [2022-12-13 11:40:26,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:26,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 11:40:26,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 11:40:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=5689, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 11:40:26,859 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 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) [2022-12-13 11:40:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:28,416 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2022-12-13 11:40:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 11:40:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 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 82 [2022-12-13 11:40:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:28,417 INFO L225 Difference]: With dead ends: 165 [2022-12-13 11:40:28,417 INFO L226 Difference]: Without dead ends: 163 [2022-12-13 11:40:28,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 104 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2683, Invalid=12323, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 11:40:28,418 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 200 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:28,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 135 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:40:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-13 11:40:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2022-12-13 11:40:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 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) [2022-12-13 11:40:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-12-13 11:40:28,588 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2022-12-13 11:40:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:28,588 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-12-13 11:40:28,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 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) [2022-12-13 11:40:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-12-13 11:40:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 11:40:28,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:28,589 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:28,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 11:40:28,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 11:40:28,790 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 23 times [2022-12-13 11:40:28,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:28,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024517854] [2022-12-13 11:40:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:28,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024517854] [2022-12-13 11:40:30,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024517854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543701360] [2022-12-13 11:40:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:40:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:30,626 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:30,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 11:40:30,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-12-13 11:40:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-13 11:40:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:31,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:35,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543701360] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:35,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:40:35,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 111 [2022-12-13 11:40:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441737651] [2022-12-13 11:40:35,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:35,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-12-13 11:40:35,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-12-13 11:40:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1784, Invalid=10426, Unknown=0, NotChecked=0, Total=12210 [2022-12-13 11:40:35,134 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 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) [2022-12-13 11:40:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:49,183 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2022-12-13 11:40:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-13 11:40:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 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 85 [2022-12-13 11:40:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:49,184 INFO L225 Difference]: With dead ends: 236 [2022-12-13 11:40:49,184 INFO L226 Difference]: Without dead ends: 170 [2022-12-13 11:40:49,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10430 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=5397, Invalid=33609, Unknown=0, NotChecked=0, Total=39006 [2022-12-13 11:40:49,187 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 496 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 4499 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 4499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:49,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 531 Invalid, 4957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 4499 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 11:40:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-13 11:40:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2022-12-13 11:40:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2) internal successors, (132), 110 states have internal predecessors, (132), 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) [2022-12-13 11:40:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2022-12-13 11:40:49,397 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 85 [2022-12-13 11:40:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:49,397 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2022-12-13 11:40:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 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) [2022-12-13 11:40:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2022-12-13 11:40:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 11:40:49,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:49,397 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:49,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 11:40:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 11:40:49,599 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 24 times [2022-12-13 11:40:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954439434] [2022-12-13 11:40:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:49,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954439434] [2022-12-13 11:40:51,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954439434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:51,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381611664] [2022-12-13 11:40:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:40:51,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:51,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:51,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:51,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 11:40:51,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-13 11:40:51,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 11:40:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:53,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:57,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381611664] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:57,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:40:57,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 138 [2022-12-13 11:40:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634062328] [2022-12-13 11:40:57,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:57,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-12-13 11:40:57,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-12-13 11:40:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=16694, Unknown=0, NotChecked=0, Total=18906 [2022-12-13 11:40:57,363 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 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) [2022-12-13 11:41:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:41:06,698 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2022-12-13 11:41:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 11:41:06,698 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 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 89 [2022-12-13 11:41:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:41:06,699 INFO L225 Difference]: With dead ends: 184 [2022-12-13 11:41:06,699 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 11:41:06,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8879 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=3979, Invalid=30431, Unknown=0, NotChecked=0, Total=34410 [2022-12-13 11:41:06,702 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:41:06,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 158 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2752 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 11:41:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 11:41:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-12-13 11:41:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 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) [2022-12-13 11:41:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-12-13 11:41:06,917 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 89 [2022-12-13 11:41:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:41:06,918 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-12-13 11:41:06,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 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) [2022-12-13 11:41:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-12-13 11:41:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 11:41:06,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:41:06,919 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:41:06,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 11:41:07,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 11:41:07,120 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:41:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 25 times [2022-12-13 11:41:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:41:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70420368] [2022-12-13 11:41:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:41:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 210 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:41:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70420368] [2022-12-13 11:41:07,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70420368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:41:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779491538] [2022-12-13 11:41:07,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:41:07,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:07,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:41:07,989 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:41:07,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 11:41:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:08,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 11:41:08,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:41:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:08,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:41:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:09,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779491538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:41:09,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:41:09,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2022-12-13 11:41:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042304646] [2022-12-13 11:41:09,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:41:09,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-13 11:41:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:41:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-13 11:41:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=6852, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 11:41:09,459 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 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) [2022-12-13 11:41:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:41:11,077 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2022-12-13 11:41:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 11:41:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 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 90 [2022-12-13 11:41:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:41:11,078 INFO L225 Difference]: With dead ends: 181 [2022-12-13 11:41:11,078 INFO L226 Difference]: Without dead ends: 179 [2022-12-13 11:41:11,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 114 SyntacticMatches, 21 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3215, Invalid=14875, Unknown=0, NotChecked=0, Total=18090 [2022-12-13 11:41:11,079 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 270 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:41:11,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 128 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:41:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-13 11:41:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2022-12-13 11:41:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 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) [2022-12-13 11:41:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-12-13 11:41:11,246 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2022-12-13 11:41:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:41:11,246 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-12-13 11:41:11,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 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) [2022-12-13 11:41:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-12-13 11:41:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 11:41:11,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:41:11,246 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:41:11,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 11:41:11,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:11,448 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:41:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 26 times [2022-12-13 11:41:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:41:11,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794883444] [2022-12-13 11:41:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:11,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:41:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:41:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794883444] [2022-12-13 11:41:13,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794883444] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:41:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982283022] [2022-12-13 11:41:13,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:41:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:41:13,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:41:13,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 11:41:13,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:41:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:41:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 144 conjunts are in the unsatisfiable core [2022-12-13 11:41:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:41:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:15,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:41:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:19,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982283022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:41:19,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:41:19,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 143 [2022-12-13 11:41:19,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052041416] [2022-12-13 11:41:19,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:41:19,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-12-13 11:41:19,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:41:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-12-13 11:41:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2672, Invalid=17634, Unknown=0, NotChecked=0, Total=20306 [2022-12-13 11:41:19,514 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 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) [2022-12-13 11:41:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:41:36,235 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2022-12-13 11:41:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-13 11:41:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 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 93 [2022-12-13 11:41:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:41:36,236 INFO L225 Difference]: With dead ends: 258 [2022-12-13 11:41:36,236 INFO L226 Difference]: Without dead ends: 186 [2022-12-13 11:41:36,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17854 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=7494, Invalid=49388, Unknown=0, NotChecked=0, Total=56882 [2022-12-13 11:41:36,239 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 572 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 5750 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 6291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 5750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:41:36,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 684 Invalid, 6291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 5750 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 11:41:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-13 11:41:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 121. [2022-12-13 11:41:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2) internal successors, (144), 120 states have internal predecessors, (144), 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) [2022-12-13 11:41:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-12-13 11:41:36,503 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 93 [2022-12-13 11:41:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:41:36,503 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-12-13 11:41:36,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 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) [2022-12-13 11:41:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-12-13 11:41:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-13 11:41:36,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:41:36,504 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:41:36,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 11:41:36,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 11:41:36,705 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:41:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 27 times [2022-12-13 11:41:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:41:36,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560241756] [2022-12-13 11:41:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:41:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:41:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560241756] [2022-12-13 11:41:38,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560241756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:41:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014078360] [2022-12-13 11:41:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:41:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:41:38,741 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:41:38,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 11:41:38,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-12-13 11:41:38,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:41:38,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 11:41:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:41:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:41,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:41:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014078360] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:41:44,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:41:44,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 150 [2022-12-13 11:41:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745583809] [2022-12-13 11:41:44,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:41:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-12-13 11:41:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:41:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-12-13 11:41:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=19748, Unknown=0, NotChecked=0, Total=22350 [2022-12-13 11:41:44,936 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 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) [2022-12-13 11:41:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:41:56,304 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-12-13 11:41:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 11:41:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 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 97 [2022-12-13 11:41:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:41:56,305 INFO L225 Difference]: With dead ends: 200 [2022-12-13 11:41:56,305 INFO L226 Difference]: Without dead ends: 125 [2022-12-13 11:41:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10427 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=4704, Invalid=35898, Unknown=0, NotChecked=0, Total=40602 [2022-12-13 11:41:56,307 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:41:56,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 165 Invalid, 3518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 11:41:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-13 11:41:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-12-13 11:41:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 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) [2022-12-13 11:41:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2022-12-13 11:41:56,582 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 97 [2022-12-13 11:41:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:41:56,582 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2022-12-13 11:41:56,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 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) [2022-12-13 11:41:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2022-12-13 11:41:56,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-13 11:41:56,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:41:56,583 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:41:56,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 11:41:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:56,784 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:41:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 28 times [2022-12-13 11:41:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:41:56,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181465357] [2022-12-13 11:41:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:56,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:41:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 253 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:57,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:41:57,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181465357] [2022-12-13 11:41:57,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181465357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:41:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926136330] [2022-12-13 11:41:57,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:41:57,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:57,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:41:57,787 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:41:57,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 11:41:57,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:41:57,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:41:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 11:41:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:41:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:58,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:41:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:59,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926136330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:41:59,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:41:59,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-12-13 11:41:59,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455471877] [2022-12-13 11:41:59,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:41:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-13 11:41:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:41:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-13 11:41:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1579, Invalid=8123, Unknown=0, NotChecked=0, Total=9702 [2022-12-13 11:41:59,629 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 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) [2022-12-13 11:42:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:42:01,561 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2022-12-13 11:42:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 11:42:01,562 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 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 98 [2022-12-13 11:42:01,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:42:01,562 INFO L225 Difference]: With dead ends: 197 [2022-12-13 11:42:01,562 INFO L226 Difference]: Without dead ends: 195 [2022-12-13 11:42:01,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 124 SyntacticMatches, 23 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7127 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3795, Invalid=17667, Unknown=0, NotChecked=0, Total=21462 [2022-12-13 11:42:01,563 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 238 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:42:01,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 145 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:42:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-13 11:42:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 102. [2022-12-13 11:42:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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) [2022-12-13 11:42:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-12-13 11:42:01,767 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-12-13 11:42:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:42:01,767 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-12-13 11:42:01,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 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) [2022-12-13 11:42:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-12-13 11:42:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 11:42:01,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:42:01,768 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:42:01,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 11:42:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:42:01,969 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:42:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:42:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash -584405303, now seen corresponding path program 29 times [2022-12-13 11:42:01,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:42:01,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80305218] [2022-12-13 11:42:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:42:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:42:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:42:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:42:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80305218] [2022-12-13 11:42:04,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80305218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:42:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679549469] [2022-12-13 11:42:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:42:04,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:42:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:42:04,302 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:42:04,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 11:42:04,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 11:42:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:42:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-13 11:42:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:42:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:05,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:42:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:10,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679549469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:42:10,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:42:10,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 54] total 131 [2022-12-13 11:42:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865893133] [2022-12-13 11:42:10,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:42:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-13 11:42:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:42:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-13 11:42:10,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2468, Invalid=14562, Unknown=0, NotChecked=0, Total=17030 [2022-12-13 11:42:10,447 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 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) [2022-12-13 11:42:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:42:27,548 INFO L93 Difference]: Finished difference Result 280 states and 308 transitions. [2022-12-13 11:42:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-13 11:42:27,549 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 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 101 [2022-12-13 11:42:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:42:27,549 INFO L225 Difference]: With dead ends: 280 [2022-12-13 11:42:27,549 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 11:42:27,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14628 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=7463, Invalid=47059, Unknown=0, NotChecked=0, Total=54522 [2022-12-13 11:42:27,552 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 643 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 5792 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 6437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 5792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:42:27,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 709 Invalid, 6437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 5792 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 11:42:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 11:42:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2022-12-13 11:42:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2) internal successors, (156), 130 states have internal predecessors, (156), 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) [2022-12-13 11:42:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2022-12-13 11:42:27,869 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 101 [2022-12-13 11:42:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:42:27,869 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2022-12-13 11:42:27,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 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) [2022-12-13 11:42:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2022-12-13 11:42:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-13 11:42:27,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:42:27,870 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:42:27,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 11:42:28,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 11:42:28,072 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:42:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:42:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2091445523, now seen corresponding path program 30 times [2022-12-13 11:42:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:42:28,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120574025] [2022-12-13 11:42:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:42:28,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:42:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:42:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:30,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:42:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120574025] [2022-12-13 11:42:30,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120574025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:42:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970681351] [2022-12-13 11:42:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:42:30,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:42:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:42:30,597 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:42:30,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 11:42:30,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-12-13 11:42:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:42:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 11:42:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:42:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:34,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:42:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:39,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970681351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:42:39,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:42:39,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 58, 58] total 166 [2022-12-13 11:42:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363934001] [2022-12-13 11:42:39,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:42:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-12-13 11:42:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:42:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-12-13 11:42:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3154, Invalid=24236, Unknown=0, NotChecked=0, Total=27390 [2022-12-13 11:42:39,090 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 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) [2022-12-13 11:42:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:42:53,411 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-12-13 11:42:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 11:42:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 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 105 [2022-12-13 11:42:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:42:53,412 INFO L225 Difference]: With dead ends: 216 [2022-12-13 11:42:53,412 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 11:42:53,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13263 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=5667, Invalid=43839, Unknown=0, NotChecked=0, Total=49506 [2022-12-13 11:42:53,414 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 161 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 3289 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 3289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:42:53,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 156 Invalid, 3646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 3289 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 11:42:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 11:42:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-12-13 11:42:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 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) [2022-12-13 11:42:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-12-13 11:42:53,740 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 105 [2022-12-13 11:42:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:42:53,740 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-12-13 11:42:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 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) [2022-12-13 11:42:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-12-13 11:42:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 11:42:53,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:42:53,741 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:42:53,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 11:42:53,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 11:42:53,942 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:42:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:42:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1966880715, now seen corresponding path program 31 times [2022-12-13 11:42:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:42:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929179645] [2022-12-13 11:42:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:42:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:42:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:42:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 300 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:42:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929179645] [2022-12-13 11:42:55,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929179645] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:42:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940431970] [2022-12-13 11:42:55,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:42:55,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:42:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:42:55,205 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:42:55,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 11:42:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:42:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-13 11:42:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:42:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:56,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:42:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:42:57,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940431970] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:42:57,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:42:57,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-12-13 11:42:57,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747320800] [2022-12-13 11:42:57,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:42:57,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-13 11:42:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:42:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-13 11:42:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1840, Invalid=9502, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 11:42:57,437 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 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) [2022-12-13 11:42:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:42:59,825 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2022-12-13 11:42:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 11:42:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 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 106 [2022-12-13 11:42:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:42:59,826 INFO L225 Difference]: With dead ends: 213 [2022-12-13 11:42:59,826 INFO L226 Difference]: Without dead ends: 211 [2022-12-13 11:42:59,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 134 SyntacticMatches, 25 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8397 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4423, Invalid=20699, Unknown=0, NotChecked=0, Total=25122 [2022-12-13 11:42:59,827 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 272 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:42:59,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 161 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:42:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-13 11:43:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 110. [2022-12-13 11:43:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 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) [2022-12-13 11:43:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-12-13 11:43:00,075 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-12-13 11:43:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:43:00,075 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-12-13 11:43:00,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 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) [2022-12-13 11:43:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-12-13 11:43:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-13 11:43:00,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:43:00,076 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:43:00,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 11:43:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 11:43:00,277 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:43:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash 900264009, now seen corresponding path program 32 times [2022-12-13 11:43:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:43:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589376802] [2022-12-13 11:43:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:43:00,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:43:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:43:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:02,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:43:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589376802] [2022-12-13 11:43:02,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589376802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:43:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834643574] [2022-12-13 11:43:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:43:02,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:43:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:43:02,949 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:43:02,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 11:43:03,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:43:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:43:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-13 11:43:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:05,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:43:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:09,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834643574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:43:09,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:43:09,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 138 [2022-12-13 11:43:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49016592] [2022-12-13 11:43:09,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:43:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-12-13 11:43:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:43:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-12-13 11:43:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2715, Invalid=16191, Unknown=0, NotChecked=0, Total=18906 [2022-12-13 11:43:09,808 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 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) [2022-12-13 11:43:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:43:29,539 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2022-12-13 11:43:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-12-13 11:43:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 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 109 [2022-12-13 11:43:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:43:29,540 INFO L225 Difference]: With dead ends: 302 [2022-12-13 11:43:29,540 INFO L226 Difference]: Without dead ends: 218 [2022-12-13 11:43:29,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16275 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=8324, Invalid=52932, Unknown=0, NotChecked=0, Total=61256 [2022-12-13 11:43:29,542 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 721 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 6827 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 7567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 6827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:43:29,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 846 Invalid, 7567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 6827 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 11:43:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-13 11:43:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 141. [2022-12-13 11:43:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2) internal successors, (168), 140 states have internal predecessors, (168), 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) [2022-12-13 11:43:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2022-12-13 11:43:29,935 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 109 [2022-12-13 11:43:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:43:29,935 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2022-12-13 11:43:29,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 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) [2022-12-13 11:43:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2022-12-13 11:43:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 11:43:29,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:43:29,936 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:43:29,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 11:43:30,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 11:43:30,138 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:43:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash -369219219, now seen corresponding path program 33 times [2022-12-13 11:43:30,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:43:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602628520] [2022-12-13 11:43:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:43:30,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:43:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:43:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:43:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602628520] [2022-12-13 11:43:33,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602628520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:43:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120478681] [2022-12-13 11:43:33,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:43:33,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:43:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:43:33,145 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:43:33,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 11:43:33,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-12-13 11:43:33,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:43:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 11:43:33,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:43:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:42,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120478681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:43:42,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:43:42,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 174 [2022-12-13 11:43:42,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840076283] [2022-12-13 11:43:42,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:43:42,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-12-13 11:43:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:43:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-12-13 11:43:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=26624, Unknown=0, NotChecked=0, Total=30102 [2022-12-13 11:43:42,282 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 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) [2022-12-13 11:43:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:43:56,731 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2022-12-13 11:43:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 11:43:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 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 113 [2022-12-13 11:43:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:43:56,732 INFO L225 Difference]: With dead ends: 232 [2022-12-13 11:43:56,732 INFO L226 Difference]: Without dead ends: 145 [2022-12-13 11:43:56,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14071 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=6260, Invalid=48262, Unknown=0, NotChecked=0, Total=54522 [2022-12-13 11:43:56,735 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 208 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 4071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:43:56,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 4071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 11:43:56,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-13 11:43:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2022-12-13 11:43:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 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) [2022-12-13 11:43:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2022-12-13 11:43:57,206 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 113 [2022-12-13 11:43:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:43:57,206 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2022-12-13 11:43:57,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 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) [2022-12-13 11:43:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2022-12-13 11:43:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 11:43:57,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:43:57,207 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:43:57,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 11:43:57,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:43:57,408 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:43:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash -618326347, now seen corresponding path program 34 times [2022-12-13 11:43:57,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:43:57,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937546081] [2022-12-13 11:43:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:43:57,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:43:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:43:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 351 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:58,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:43:58,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937546081] [2022-12-13 11:43:58,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937546081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:43:58,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689807663] [2022-12-13 11:43:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:43:58,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:43:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:43:58,885 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:43:58,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 11:43:58,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:43:58,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:43:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-13 11:43:58,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:43:59,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:01,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689807663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:01,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:44:01,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2022-12-13 11:44:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834349978] [2022-12-13 11:44:01,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:01,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-12-13 11:44:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-12-13 11:44:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2121, Invalid=10989, Unknown=0, NotChecked=0, Total=13110 [2022-12-13 11:44:01,215 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 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) [2022-12-13 11:44:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:03,547 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2022-12-13 11:44:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 11:44:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 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 114 [2022-12-13 11:44:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:03,548 INFO L225 Difference]: With dead ends: 229 [2022-12-13 11:44:03,548 INFO L226 Difference]: Without dead ends: 227 [2022-12-13 11:44:03,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 144 SyntacticMatches, 27 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9771 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5099, Invalid=23971, Unknown=0, NotChecked=0, Total=29070 [2022-12-13 11:44:03,550 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 370 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:03,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 159 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:44:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-13 11:44:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 118. [2022-12-13 11:44:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 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) [2022-12-13 11:44:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-12-13 11:44:03,840 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2022-12-13 11:44:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:03,840 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-12-13 11:44:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 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) [2022-12-13 11:44:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-12-13 11:44:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-13 11:44:03,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:03,840 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:03,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 11:44:04,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 11:44:04,042 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 559354313, now seen corresponding path program 35 times [2022-12-13 11:44:04,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:04,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662750182] [2022-12-13 11:44:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662750182] [2022-12-13 11:44:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662750182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:44:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649802777] [2022-12-13 11:44:06,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:44:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:06,844 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:06,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 11:44:06,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-12-13 11:44:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-13 11:44:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:09,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:14,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649802777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:14,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:44:14,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 62] total 151 [2022-12-13 11:44:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192024079] [2022-12-13 11:44:14,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:14,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-12-13 11:44:14,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-12-13 11:44:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3266, Invalid=19384, Unknown=0, NotChecked=0, Total=22650 [2022-12-13 11:44:14,106 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 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) [2022-12-13 11:44:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:35,803 INFO L93 Difference]: Finished difference Result 324 states and 356 transitions. [2022-12-13 11:44:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-12-13 11:44:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 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 117 [2022-12-13 11:44:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:35,804 INFO L225 Difference]: With dead ends: 324 [2022-12-13 11:44:35,804 INFO L226 Difference]: Without dead ends: 234 [2022-12-13 11:44:35,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19159 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=9735, Invalid=61821, Unknown=0, NotChecked=0, Total=71556 [2022-12-13 11:44:35,808 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 800 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 7529 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 8393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 7529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:35,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 950 Invalid, 8393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 7529 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-13 11:44:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-13 11:44:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 151. [2022-12-13 11:44:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.2) internal successors, (180), 150 states have internal predecessors, (180), 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) [2022-12-13 11:44:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2022-12-13 11:44:36,292 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 117 [2022-12-13 11:44:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:36,293 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2022-12-13 11:44:36,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 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) [2022-12-13 11:44:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2022-12-13 11:44:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 11:44:36,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:36,294 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:36,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 11:44:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 11:44:36,495 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 430006253, now seen corresponding path program 36 times [2022-12-13 11:44:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718391331] [2022-12-13 11:44:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718391331] [2022-12-13 11:44:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718391331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:44:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891098826] [2022-12-13 11:44:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:44:39,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:39,613 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:39,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 11:44:39,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-12-13 11:44:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 11:44:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:43,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:49,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891098826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:49,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:44:49,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 66, 66] total 190 [2022-12-13 11:44:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282981726] [2022-12-13 11:44:49,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:49,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-12-13 11:44:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-12-13 11:44:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=31803, Unknown=0, NotChecked=0, Total=35910 [2022-12-13 11:44:49,793 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 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) [2022-12-13 11:45:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:07,832 INFO L93 Difference]: Finished difference Result 248 states and 278 transitions. [2022-12-13 11:45:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 11:45:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 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 121 [2022-12-13 11:45:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:07,833 INFO L225 Difference]: With dead ends: 248 [2022-12-13 11:45:07,833 INFO L226 Difference]: Without dead ends: 155 [2022-12-13 11:45:07,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17194 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=7466, Invalid=57814, Unknown=0, NotChecked=0, Total=65280 [2022-12-13 11:45:07,836 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 227 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 3751 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 4257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 3751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:07,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 159 Invalid, 4257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 3751 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-13 11:45:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-13 11:45:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-12-13 11:45:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 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) [2022-12-13 11:45:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2022-12-13 11:45:08,299 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 121 [2022-12-13 11:45:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:08,300 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2022-12-13 11:45:08,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 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) [2022-12-13 11:45:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2022-12-13 11:45:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-13 11:45:08,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:08,301 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:08,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 11:45:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 11:45:08,502 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1832221387, now seen corresponding path program 37 times [2022-12-13 11:45:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:08,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726557260] [2022-12-13 11:45:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 406 proven. 1249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:10,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:10,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726557260] [2022-12-13 11:45:10,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726557260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:10,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981048862] [2022-12-13 11:45:10,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:45:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:10,093 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:10,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 11:45:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 11:45:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:11,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:12,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981048862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:12,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:12,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2022-12-13 11:45:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881396449] [2022-12-13 11:45:12,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-13 11:45:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-13 11:45:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=12584, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 11:45:12,660 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 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) [2022-12-13 11:45:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:15,909 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2022-12-13 11:45:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 11:45:15,909 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 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 122 [2022-12-13 11:45:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:15,910 INFO L225 Difference]: With dead ends: 245 [2022-12-13 11:45:15,910 INFO L226 Difference]: Without dead ends: 243 [2022-12-13 11:45:15,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 154 SyntacticMatches, 29 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11249 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5823, Invalid=27483, Unknown=0, NotChecked=0, Total=33306 [2022-12-13 11:45:15,911 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 536 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 162 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:45:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-13 11:45:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 126. [2022-12-13 11:45:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 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) [2022-12-13 11:45:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-12-13 11:45:16,252 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2022-12-13 11:45:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:16,252 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-12-13 11:45:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 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) [2022-12-13 11:45:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-12-13 11:45:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-13 11:45:16,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:16,253 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:16,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 11:45:16,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:16,455 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849993, now seen corresponding path program 38 times [2022-12-13 11:45:16,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:16,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437404010] [2022-12-13 11:45:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:16,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:19,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437404010] [2022-12-13 11:45:19,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437404010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:19,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875606483] [2022-12-13 11:45:19,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:45:19,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:19,766 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:19,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 11:45:19,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:45:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-13 11:45:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:23,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:31,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875606483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:31,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:31,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 66] total 191 [2022-12-13 11:45:31,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909935662] [2022-12-13 11:45:31,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:31,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-12-13 11:45:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-12-13 11:45:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4708, Invalid=31582, Unknown=0, NotChecked=0, Total=36290 [2022-12-13 11:45:31,259 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 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) [2022-12-13 11:46:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:46:00,574 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2022-12-13 11:46:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-12-13 11:46:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 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 125 [2022-12-13 11:46:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:46:00,576 INFO L225 Difference]: With dead ends: 346 [2022-12-13 11:46:00,576 INFO L226 Difference]: Without dead ends: 250 [2022-12-13 11:46:00,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32146 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=13178, Invalid=88264, Unknown=0, NotChecked=0, Total=101442 [2022-12-13 11:46:00,580 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 888 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 9245 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 10220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 9245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:46:00,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1136 Invalid, 10220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 9245 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-13 11:46:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-13 11:46:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 161. [2022-12-13 11:46:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.2) internal successors, (192), 160 states have internal predecessors, (192), 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) [2022-12-13 11:46:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2022-12-13 11:46:01,147 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 125 [2022-12-13 11:46:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:46:01,147 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2022-12-13 11:46:01,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 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) [2022-12-13 11:46:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2022-12-13 11:46:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-13 11:46:01,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:46:01,148 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:46:01,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 11:46:01,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 11:46:01,350 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:46:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash 900249197, now seen corresponding path program 39 times [2022-12-13 11:46:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:46:01,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491589196] [2022-12-13 11:46:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:46:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:05,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:46:05,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491589196] [2022-12-13 11:46:05,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491589196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:46:05,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576502555] [2022-12-13 11:46:05,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:46:05,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:46:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:46:05,359 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:46:05,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 11:46:05,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-12-13 11:46:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:46:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-13 11:46:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:46:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:10,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:46:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:18,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576502555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:46:18,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:46:18,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 70, 70] total 202 [2022-12-13 11:46:18,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034962897] [2022-12-13 11:46:18,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:46:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-12-13 11:46:18,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:46:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-12-13 11:46:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4633, Invalid=35969, Unknown=0, NotChecked=0, Total=40602 [2022-12-13 11:46:18,214 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 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) [2022-12-13 11:46:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:46:40,414 INFO L93 Difference]: Finished difference Result 264 states and 296 transitions. [2022-12-13 11:46:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 11:46:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 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 129 [2022-12-13 11:46:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:46:40,415 INFO L225 Difference]: With dead ends: 264 [2022-12-13 11:46:40,415 INFO L226 Difference]: Without dead ends: 165 [2022-12-13 11:46:40,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19314 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=8310, Invalid=64860, Unknown=0, NotChecked=0, Total=73170 [2022-12-13 11:46:40,418 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 206 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:46:40,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 218 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 11:46:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-13 11:46:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-12-13 11:46:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 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) [2022-12-13 11:46:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2022-12-13 11:46:41,083 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 129 [2022-12-13 11:46:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:46:41,083 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2022-12-13 11:46:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 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) [2022-12-13 11:46:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2022-12-13 11:46:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 11:46:41,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:46:41,084 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:46:41,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 11:46:41,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 11:46:41,285 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:46:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash 219943861, now seen corresponding path program 40 times [2022-12-13 11:46:41,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:46:41,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272512952] [2022-12-13 11:46:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:46:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 465 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:43,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:46:43,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272512952] [2022-12-13 11:46:43,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272512952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:46:43,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382380933] [2022-12-13 11:46:43,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:46:43,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:46:43,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:46:43,570 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:46:43,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 11:46:43,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:46:43,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:46:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-13 11:46:43,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:46:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:45,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:46:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:47,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382380933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:46:47,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:46:47,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-12-13 11:46:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527682348] [2022-12-13 11:46:47,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:46:47,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-13 11:46:47,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:46:47,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-13 11:46:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2743, Invalid=14287, Unknown=0, NotChecked=0, Total=17030 [2022-12-13 11:46:47,339 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 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) [2022-12-13 11:46:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:46:50,898 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-12-13 11:46:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 11:46:50,899 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 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 130 [2022-12-13 11:46:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:46:50,900 INFO L225 Difference]: With dead ends: 261 [2022-12-13 11:46:50,900 INFO L226 Difference]: Without dead ends: 259 [2022-12-13 11:46:50,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 164 SyntacticMatches, 31 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12831 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6595, Invalid=31235, Unknown=0, NotChecked=0, Total=37830 [2022-12-13 11:46:50,902 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 410 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 11:46:50,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 173 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 11:46:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-12-13 11:46:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 134. [2022-12-13 11:46:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 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) [2022-12-13 11:46:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-12-13 11:46:51,298 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2022-12-13 11:46:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:46:51,298 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-12-13 11:46:51,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 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) [2022-12-13 11:46:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-12-13 11:46:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 11:46:51,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:46:51,298 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:46:51,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 11:46:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:46:51,499 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:46:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1767705399, now seen corresponding path program 41 times [2022-12-13 11:46:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:46:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909127294] [2022-12-13 11:46:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:46:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:46:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909127294] [2022-12-13 11:46:55,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909127294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:46:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432787424] [2022-12-13 11:46:55,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:46:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:46:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:46:55,431 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:46:55,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 11:46:55,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-12-13 11:46:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:46:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-13 11:46:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:46:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:58,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:05,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432787424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:05,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:05,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 70] total 171 [2022-12-13 11:47:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613676390] [2022-12-13 11:47:05,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:05,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-12-13 11:47:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-12-13 11:47:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4174, Invalid=24896, Unknown=0, NotChecked=0, Total=29070 [2022-12-13 11:47:05,990 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 171 states, 171 states have (on average 2.1052631578947367) internal successors, (360), 171 states have internal predecessors, (360), 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) [2022-12-13 11:47:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:47:40,600 INFO L93 Difference]: Finished difference Result 368 states and 404 transitions. [2022-12-13 11:47:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-12-13 11:47:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.1052631578947367) internal successors, (360), 171 states have internal predecessors, (360), 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 133 [2022-12-13 11:47:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:47:40,601 INFO L225 Difference]: With dead ends: 368 [2022-12-13 11:47:40,602 INFO L226 Difference]: Without dead ends: 266 [2022-12-13 11:47:40,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25134 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=12603, Invalid=80727, Unknown=0, NotChecked=0, Total=93330 [2022-12-13 11:47:40,606 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 976 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 9813 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 10927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 9813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:47:40,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1190 Invalid, 10927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 9813 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 11:47:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-12-13 11:47:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2022-12-13 11:47:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2) internal successors, (204), 170 states have internal predecessors, (204), 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) [2022-12-13 11:47:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2022-12-13 11:47:41,270 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 133 [2022-12-13 11:47:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:47:41,271 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2022-12-13 11:47:41,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 2.1052631578947367) internal successors, (360), 171 states have internal predecessors, (360), 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) [2022-12-13 11:47:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2022-12-13 11:47:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-13 11:47:41,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:47:41,271 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:41,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 11:47:41,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 11:47:41,472 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:47:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash 863775981, now seen corresponding path program 42 times [2022-12-13 11:47:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:41,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440663098] [2022-12-13 11:47:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1426 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:45,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440663098] [2022-12-13 11:47:45,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440663098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030845523] [2022-12-13 11:47:45,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:47:45,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:45,724 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:45,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 11:47:45,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-12-13 11:47:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:47:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-13 11:47:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:51,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:59,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030845523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:59,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:59,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 72, 72] total 210 [2022-12-13 11:47:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606683166] [2022-12-13 11:47:59,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2022-12-13 11:47:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2022-12-13 11:47:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5032, Invalid=38858, Unknown=0, NotChecked=0, Total=43890 [2022-12-13 11:47:59,147 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 210 states, 210 states have (on average 1.9238095238095239) internal successors, (404), 210 states have internal predecessors, (404), 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) [2022-12-13 11:48:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:48:26,168 INFO L93 Difference]: Finished difference Result 280 states and 314 transitions. [2022-12-13 11:48:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 11:48:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 1.9238095238095239) internal successors, (404), 210 states have internal predecessors, (404), 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 137 [2022-12-13 11:48:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:48:26,169 INFO L225 Difference]: With dead ends: 280 [2022-12-13 11:48:26,169 INFO L226 Difference]: Without dead ends: 175 [2022-12-13 11:48:26,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20655 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=8971, Invalid=70271, Unknown=0, NotChecked=0, Total=79242 [2022-12-13 11:48:26,172 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 215 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 5413 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 6046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 5413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:48:26,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 204 Invalid, 6046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 5413 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 11:48:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-13 11:48:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-12-13 11:48:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1941176470588235) internal successors, (203), 170 states have internal predecessors, (203), 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) [2022-12-13 11:48:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2022-12-13 11:48:26,831 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 137 [2022-12-13 11:48:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:48:26,831 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2022-12-13 11:48:26,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 1.9238095238095239) internal successors, (404), 210 states have internal predecessors, (404), 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) [2022-12-13 11:48:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2022-12-13 11:48:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-13 11:48:26,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:48:26,832 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:48:26,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 11:48:27,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:48:27,033 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:48:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:48:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2004992565, now seen corresponding path program 43 times [2022-12-13 11:48:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:48:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439327914] [2022-12-13 11:48:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:48:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 528 proven. 1619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:28,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:48:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439327914] [2022-12-13 11:48:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439327914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:48:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340659509] [2022-12-13 11:48:28,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:48:28,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:48:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:48:28,932 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:48:28,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 11:48:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 11:48:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:48:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:30,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:48:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:32,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340659509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:48:32,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:48:32,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-12-13 11:48:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246068914] [2022-12-13 11:48:32,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:48:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-12-13 11:48:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:48:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-12-13 11:48:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3084, Invalid=16098, Unknown=0, NotChecked=0, Total=19182 [2022-12-13 11:48:32,294 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 139 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 139 states have internal predecessors, (210), 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) [2022-12-13 11:48:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:48:36,338 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2022-12-13 11:48:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-13 11:48:36,338 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 139 states have internal predecessors, (210), 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 138 [2022-12-13 11:48:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:48:36,339 INFO L225 Difference]: With dead ends: 277 [2022-12-13 11:48:36,339 INFO L226 Difference]: Without dead ends: 275 [2022-12-13 11:48:36,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 174 SyntacticMatches, 33 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14517 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7415, Invalid=35227, Unknown=0, NotChecked=0, Total=42642 [2022-12-13 11:48:36,341 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 376 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:48:36,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 194 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:48:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-13 11:48:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 142. [2022-12-13 11:48:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 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) [2022-12-13 11:48:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-12-13 11:48:36,802 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 138 [2022-12-13 11:48:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:48:36,802 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-12-13 11:48:36,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 139 states have internal predecessors, (210), 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) [2022-12-13 11:48:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-12-13 11:48:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-13 11:48:36,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:48:36,803 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:48:36,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 11:48:37,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 11:48:37,004 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:48:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:48:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 628143689, now seen corresponding path program 44 times [2022-12-13 11:48:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:48:37,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319193144] [2022-12-13 11:48:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:37,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:48:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1520 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:41,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:48:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319193144] [2022-12-13 11:48:41,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319193144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:48:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646516621] [2022-12-13 11:48:41,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:48:41,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:48:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:48:41,281 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:48:41,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 11:48:41,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:48:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:48:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 144 conjunts are in the unsatisfiable core [2022-12-13 11:48:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:48:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:43,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:48:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:51,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646516621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:48:51,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:48:51,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 178 [2022-12-13 11:48:51,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533505377] [2022-12-13 11:48:51,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:48:51,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2022-12-13 11:48:51,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:48:51,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2022-12-13 11:48:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4495, Invalid=27011, Unknown=0, NotChecked=0, Total=31506 [2022-12-13 11:48:51,465 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 178 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 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) [2022-12-13 11:49:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:26,192 INFO L93 Difference]: Finished difference Result 390 states and 428 transitions. [2022-12-13 11:49:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-12-13 11:49:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 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 141 [2022-12-13 11:49:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:26,193 INFO L225 Difference]: With dead ends: 390 [2022-12-13 11:49:26,193 INFO L226 Difference]: Without dead ends: 282 [2022-12-13 11:49:26,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27275 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=13720, Invalid=88360, Unknown=0, NotChecked=0, Total=102080 [2022-12-13 11:49:26,197 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1068 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 11072 mSolverCounterSat, 1239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 12311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1239 IncrementalHoareTripleChecker+Valid, 11072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:26,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1068 Valid, 1352 Invalid, 12311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1239 Valid, 11072 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-13 11:49:26,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-13 11:49:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 181. [2022-12-13 11:49:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2) internal successors, (216), 180 states have internal predecessors, (216), 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) [2022-12-13 11:49:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2022-12-13 11:49:26,983 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 141 [2022-12-13 11:49:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:26,983 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2022-12-13 11:49:26,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 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) [2022-12-13 11:49:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2022-12-13 11:49:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-13 11:49:26,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:26,984 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:26,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 11:49:27,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 11:49:27,186 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1518584685, now seen corresponding path program 45 times [2022-12-13 11:49:27,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:27,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435862926] [2022-12-13 11:49:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:27,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1617 proven. 764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:32,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435862926] [2022-12-13 11:49:32,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435862926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:49:32,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811755907] [2022-12-13 11:49:32,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:49:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:32,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:32,083 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:32,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 11:49:32,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2022-12-13 11:49:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-13 11:49:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:38,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:48,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811755907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:48,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:49:48,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 78, 78] total 226 [2022-12-13 11:49:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163852562] [2022-12-13 11:49:48,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 226 states [2022-12-13 11:49:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2022-12-13 11:49:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5781, Invalid=45069, Unknown=0, NotChecked=0, Total=50850 [2022-12-13 11:49:48,483 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 226 states, 226 states have (on average 1.8938053097345133) internal successors, (428), 226 states have internal predecessors, (428), 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) [2022-12-13 11:50:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:50:17,252 INFO L93 Difference]: Finished difference Result 296 states and 332 transitions. [2022-12-13 11:50:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 11:50:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 226 states, 226 states have (on average 1.8938053097345133) internal successors, (428), 226 states have internal predecessors, (428), 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 145 [2022-12-13 11:50:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:50:17,253 INFO L225 Difference]: With dead ends: 296 [2022-12-13 11:50:17,253 INFO L226 Difference]: Without dead ends: 185 [2022-12-13 11:50:17,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24174 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=10342, Invalid=81164, Unknown=0, NotChecked=0, Total=91506 [2022-12-13 11:50:17,257 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 5167 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 5871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 5167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:50:17,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 186 Invalid, 5871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 5167 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 11:50:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-13 11:50:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2022-12-13 11:50:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 states have internal predecessors, (215), 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) [2022-12-13 11:50:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2022-12-13 11:50:18,030 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 145 [2022-12-13 11:50:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:50:18,030 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2022-12-13 11:50:18,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 226 states, 226 states have (on average 1.8938053097345133) internal successors, (428), 226 states have internal predecessors, (428), 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) [2022-12-13 11:50:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2022-12-13 11:50:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 11:50:18,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:50:18,031 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:50:18,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 11:50:18,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 11:50:18,232 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:50:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:50:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1365479605, now seen corresponding path program 46 times [2022-12-13 11:50:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:50:18,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551614136] [2022-12-13 11:50:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:50:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:50:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:50:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 595 proven. 1822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:50:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551614136] [2022-12-13 11:50:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551614136] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:50:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408607929] [2022-12-13 11:50:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:50:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:50:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:50:20,380 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:50:20,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 11:50:20,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:50:20,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:50:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-13 11:50:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:50:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:22,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:50:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:24,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408607929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:50:24,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:50:24,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 147 [2022-12-13 11:50:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459684133] [2022-12-13 11:50:24,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:50:24,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-12-13 11:50:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:50:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-12-13 11:50:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3445, Invalid=18017, Unknown=0, NotChecked=0, Total=21462 [2022-12-13 11:50:24,271 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 147 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 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) [2022-12-13 11:50:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:50:28,812 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2022-12-13 11:50:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 11:50:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 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 146 [2022-12-13 11:50:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:50:28,814 INFO L225 Difference]: With dead ends: 293 [2022-12-13 11:50:28,814 INFO L226 Difference]: Without dead ends: 291 [2022-12-13 11:50:28,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 184 SyntacticMatches, 35 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16307 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8283, Invalid=39459, Unknown=0, NotChecked=0, Total=47742 [2022-12-13 11:50:28,816 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 584 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:50:28,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 187 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:50:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-12-13 11:50:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 150. [2022-12-13 11:50:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 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) [2022-12-13 11:50:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-12-13 11:50:29,351 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2022-12-13 11:50:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:50:29,351 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-12-13 11:50:29,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 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) [2022-12-13 11:50:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-12-13 11:50:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-13 11:50:29,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:50:29,352 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:50:29,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 11:50:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:50:29,552 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:50:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:50:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1372477385, now seen corresponding path program 47 times [2022-12-13 11:50:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:50:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638174793] [2022-12-13 11:50:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:50:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:50:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:50:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1717 proven. 804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:35,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:50:35,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638174793] [2022-12-13 11:50:35,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638174793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:50:35,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743939548] [2022-12-13 11:50:35,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:50:35,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:50:35,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:50:35,308 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:50:35,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 11:50:35,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-12-13 11:50:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:50:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 160 conjunts are in the unsatisfiable core [2022-12-13 11:50:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:50:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:39,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:50:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:50:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743939548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:50:47,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:50:47,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 78] total 191 [2022-12-13 11:50:47,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950406813] [2022-12-13 11:50:47,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:50:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-12-13 11:50:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:50:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-12-13 11:50:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5192, Invalid=31098, Unknown=0, NotChecked=0, Total=36290 [2022-12-13 11:50:47,650 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 191 states, 191 states have (on average 2.115183246073298) internal successors, (404), 191 states have internal predecessors, (404), 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) [2022-12-13 11:51:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:51:31,271 INFO L93 Difference]: Finished difference Result 412 states and 452 transitions. [2022-12-13 11:51:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-12-13 11:51:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 2.115183246073298) internal successors, (404), 191 states have internal predecessors, (404), 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 149 [2022-12-13 11:51:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:51:31,272 INFO L225 Difference]: With dead ends: 412 [2022-12-13 11:51:31,272 INFO L226 Difference]: Without dead ends: 298 [2022-12-13 11:51:31,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=15677, Invalid=100945, Unknown=0, NotChecked=0, Total=116622 [2022-12-13 11:51:31,277 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1167 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 11983 mSolverCounterSat, 1399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 13382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1399 IncrementalHoareTripleChecker+Valid, 11983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:51:31,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 1475 Invalid, 13382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1399 Valid, 11983 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-13 11:51:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-13 11:51:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 191. [2022-12-13 11:51:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2) internal successors, (228), 190 states have internal predecessors, (228), 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) [2022-12-13 11:51:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2022-12-13 11:51:32,192 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 149 [2022-12-13 11:51:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:51:32,192 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2022-12-13 11:51:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 2.115183246073298) internal successors, (404), 191 states have internal predecessors, (404), 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) [2022-12-13 11:51:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2022-12-13 11:51:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-13 11:51:32,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:51:32,193 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:51:32,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-13 11:51:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:32,394 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:51:32,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:51:32,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1004045843, now seen corresponding path program 48 times [2022-12-13 11:51:32,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:51:32,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903076093] [2022-12-13 11:51:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:51:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:51:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:51:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 1820 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:37,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:51:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903076093] [2022-12-13 11:51:37,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903076093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:51:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372252574] [2022-12-13 11:51:37,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:51:37,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:37,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:51:37,865 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:51:37,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffec267c-20ed-4acd-9a2e-ba9992750eb5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 11:51:38,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-12-13 11:51:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:51:38,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-13 11:51:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:51:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:44,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:51:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:54,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372252574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:51:54,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:51:54,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 82, 82] total 238 [2022-12-13 11:51:54,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181754094] [2022-12-13 11:51:54,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:51:54,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 238 states [2022-12-13 11:51:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:51:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2022-12-13 11:51:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6406, Invalid=50000, Unknown=0, NotChecked=0, Total=56406 [2022-12-13 11:51:54,392 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 238 states, 238 states have (on average 1.8991596638655461) internal successors, (452), 238 states have internal predecessors, (452), 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)