./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8 --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- 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-e04fb08 [2022-11-16 12:18:39,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:18:39,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:18:39,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:18:39,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:18:39,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:18:39,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:18:39,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:18:39,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:18:39,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:18:39,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:18:39,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:18:39,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:18:39,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:18:39,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:18:39,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:18:39,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:18:39,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:18:39,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:18:39,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:18:39,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:18:39,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:18:39,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:18:39,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:18:39,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:18:39,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:18:39,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:18:39,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:18:39,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:18:39,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:18:39,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:18:39,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:18:39,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:18:39,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:18:39,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:18:39,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:18:39,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:18:39,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:18:39,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:18:39,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:18:39,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:18:39,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:18:39,243 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:18:39,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:18:39,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:18:39,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:18:39,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:18:39,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:18:39,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:18:39,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:18:39,260 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:18:39,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:18:39,260 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:18:39,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:18:39,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:18:39,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:18:39,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:18:39,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:18:39,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:18:39,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:18:39,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:18:39,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:18:39,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:18:39,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:18:39,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:18:39,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:18:39,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:18:39,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:18:39,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:18:39,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:18:39,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:18:39,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:18:39,267 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:18:39,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:18:39,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:18:39,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-11-16 12:18:39,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:18:39,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:18:39,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:18:39,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:18:39,609 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:18:39,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-16 12:18:39,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/data/d7731294f/53aa00112f984405b7e53cf2194d0a08/FLAG1ef7f857a [2022-11-16 12:18:40,275 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:18:40,285 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-16 12:18:40,294 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/data/d7731294f/53aa00112f984405b7e53cf2194d0a08/FLAG1ef7f857a [2022-11-16 12:18:40,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/data/d7731294f/53aa00112f984405b7e53cf2194d0a08 [2022-11-16 12:18:40,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:18:40,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:18:40,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:18:40,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:18:40,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:18:40,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:18:40" (1/1) ... [2022-11-16 12:18:40,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122b6801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:40, skipping insertion in model container [2022-11-16 12:18:40,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:18:40" (1/1) ... [2022-11-16 12:18:40,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:18:40,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:18:40,915 WARN L229 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_e44b9f82-ae24-425c-94d3-057f81e1dbdb/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-16 12:18:40,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:18:40,981 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:18:40,999 WARN L229 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_e44b9f82-ae24-425c-94d3-057f81e1dbdb/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-16 12:18:41,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:18:41,099 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:18:41,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41 WrapperNode [2022-11-16 12:18:41,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:18:41,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:18:41,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:18:41,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:18:41,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,179 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 189 [2022-11-16 12:18:41,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:18:41,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:18:41,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:18:41,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:18:41,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:18:41,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:18:41,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:18:41,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:18:41,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (1/1) ... [2022-11-16 12:18:41,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:18:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:41,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:18:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:18:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:18:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:18:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-16 12:18:41,358 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-16 12:18:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:18:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:18:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:18:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:18:41,444 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:18:41,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:18:42,044 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:18:42,068 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:18:42,068 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:18:42,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:18:42 BoogieIcfgContainer [2022-11-16 12:18:42,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:18:42,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:18:42,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:18:42,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:18:42,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:18:40" (1/3) ... [2022-11-16 12:18:42,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e3181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:18:42, skipping insertion in model container [2022-11-16 12:18:42,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:41" (2/3) ... [2022-11-16 12:18:42,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e3181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:18:42, skipping insertion in model container [2022-11-16 12:18:42,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:18:42" (3/3) ... [2022-11-16 12:18:42,093 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-11-16 12:18:42,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:18:42,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:18:42,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:18:42,191 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;@26793e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:18:42,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:18:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 77 states have (on average 1.6623376623376624) internal successors, (128), 80 states have internal predecessors, (128), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:18:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:18:42,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:42,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:42,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:42,215 INFO L85 PathProgramCache]: Analyzing trace with hash 44370170, now seen corresponding path program 1 times [2022-11-16 12:18:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:42,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970421076] [2022-11-16 12:18:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:42,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:42,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970421076] [2022-11-16 12:18:42,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970421076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:42,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:42,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:18:42,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934117022] [2022-11-16 12:18:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:42,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:42,694 INFO L87 Difference]: Start difference. First operand has 90 states, 77 states have (on average 1.6623376623376624) internal successors, (128), 80 states have internal predecessors, (128), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:42,787 INFO L93 Difference]: Finished difference Result 224 states and 379 transitions. [2022-11-16 12:18:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:42,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-16 12:18:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:42,801 INFO L225 Difference]: With dead ends: 224 [2022-11-16 12:18:42,802 INFO L226 Difference]: Without dead ends: 129 [2022-11-16 12:18:42,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:42,809 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 60 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:42,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 273 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-16 12:18:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2022-11-16 12:18:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 104 states have (on average 1.5769230769230769) internal successors, (164), 106 states have internal predecessors, (164), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:18:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 187 transitions. [2022-11-16 12:18:42,864 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 187 transitions. Word has length 37 [2022-11-16 12:18:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:42,866 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 187 transitions. [2022-11-16 12:18:42,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 187 transitions. [2022-11-16 12:18:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 12:18:42,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:42,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:42,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:18:42,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash 34489760, now seen corresponding path program 1 times [2022-11-16 12:18:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:42,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739960396] [2022-11-16 12:18:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:43,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:43,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:43,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:43,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:43,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739960396] [2022-11-16 12:18:43,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739960396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:43,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83385884] [2022-11-16 12:18:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:43,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:43,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:43,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:18:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:18:43,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:18:43,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:43,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83385884] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:43,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:18:43,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2022-11-16 12:18:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550827727] [2022-11-16 12:18:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:43,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:43,790 INFO L87 Difference]: Start difference. First operand 119 states and 187 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:43,827 INFO L93 Difference]: Finished difference Result 211 states and 330 transitions. [2022-11-16 12:18:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-11-16 12:18:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:43,835 INFO L225 Difference]: With dead ends: 211 [2022-11-16 12:18:43,840 INFO L226 Difference]: Without dead ends: 146 [2022-11-16 12:18:43,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:43,842 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 62 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:43,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 263 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-16 12:18:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2022-11-16 12:18:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 104 states have (on average 1.5576923076923077) internal successors, (162), 106 states have internal predecessors, (162), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:18:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 185 transitions. [2022-11-16 12:18:43,880 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 185 transitions. Word has length 38 [2022-11-16 12:18:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:43,881 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 185 transitions. [2022-11-16 12:18:43,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 185 transitions. [2022-11-16 12:18:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:18:43,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:43,886 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:43,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:44,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 12:18:44,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 927698919, now seen corresponding path program 1 times [2022-11-16 12:18:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:44,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832568338] [2022-11-16 12:18:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:44,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832568338] [2022-11-16 12:18:44,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832568338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:44,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:44,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:18:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525786228] [2022-11-16 12:18:44,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:44,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:44,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:44,180 INFO L87 Difference]: Start difference. First operand 119 states and 185 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:44,213 INFO L93 Difference]: Finished difference Result 215 states and 336 transitions. [2022-11-16 12:18:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-16 12:18:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:44,221 INFO L225 Difference]: With dead ends: 215 [2022-11-16 12:18:44,223 INFO L226 Difference]: Without dead ends: 180 [2022-11-16 12:18:44,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:44,225 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 51 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:44,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 262 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-16 12:18:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 171. [2022-11-16 12:18:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.5333333333333334) internal successors, (230), 153 states have internal predecessors, (230), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 12:18:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2022-11-16 12:18:44,268 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 39 [2022-11-16 12:18:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:44,269 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2022-11-16 12:18:44,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2022-11-16 12:18:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:18:44,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:44,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:18:44,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash 764253352, now seen corresponding path program 1 times [2022-11-16 12:18:44,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:44,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063604366] [2022-11-16 12:18:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063604366] [2022-11-16 12:18:44,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063604366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:44,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550823514] [2022-11-16 12:18:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:44,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:44,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:18:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:18:44,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:44,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:44,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550823514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:44,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:44,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-16 12:18:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046670767] [2022-11-16 12:18:44,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:44,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:18:44,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:18:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:18:44,912 INFO L87 Difference]: Start difference. First operand 171 states and 264 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:18:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:45,321 INFO L93 Difference]: Finished difference Result 595 states and 924 transitions. [2022-11-16 12:18:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:18:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-11-16 12:18:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:45,325 INFO L225 Difference]: With dead ends: 595 [2022-11-16 12:18:45,325 INFO L226 Difference]: Without dead ends: 459 [2022-11-16 12:18:45,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:18:45,327 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 524 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:45,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1763 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:18:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-16 12:18:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 292. [2022-11-16 12:18:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 258 states have (on average 1.496124031007752) internal successors, (386), 262 states have internal predecessors, (386), 30 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (32), 29 states have call predecessors, (32), 28 states have call successors, (32) [2022-11-16 12:18:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 448 transitions. [2022-11-16 12:18:45,387 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 448 transitions. Word has length 39 [2022-11-16 12:18:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:45,389 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 448 transitions. [2022-11-16 12:18:45,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:18:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 448 transitions. [2022-11-16 12:18:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:18:45,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:45,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:45,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:45,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash 177447338, now seen corresponding path program 1 times [2022-11-16 12:18:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:45,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344048640] [2022-11-16 12:18:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:45,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344048640] [2022-11-16 12:18:45,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344048640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:45,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:45,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:18:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460807404] [2022-11-16 12:18:45,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:45,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:18:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:45,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:18:45,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:18:45,745 INFO L87 Difference]: Start difference. First operand 292 states and 448 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:45,902 INFO L93 Difference]: Finished difference Result 629 states and 959 transitions. [2022-11-16 12:18:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:18:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-16 12:18:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:45,907 INFO L225 Difference]: With dead ends: 629 [2022-11-16 12:18:45,907 INFO L226 Difference]: Without dead ends: 386 [2022-11-16 12:18:45,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:18:45,912 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 75 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:45,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 711 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-16 12:18:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2022-11-16 12:18:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 344 states have (on average 1.433139534883721) internal successors, (493), 348 states have internal predecessors, (493), 34 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (36), 35 states have call predecessors, (36), 32 states have call successors, (36) [2022-11-16 12:18:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 563 transitions. [2022-11-16 12:18:45,965 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 563 transitions. Word has length 39 [2022-11-16 12:18:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:45,966 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 563 transitions. [2022-11-16 12:18:45,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 563 transitions. [2022-11-16 12:18:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:18:45,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:45,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:45,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:18:45,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1273844844, now seen corresponding path program 1 times [2022-11-16 12:18:45,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:45,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437934485] [2022-11-16 12:18:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:46,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437934485] [2022-11-16 12:18:46,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437934485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:46,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:46,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:18:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102037858] [2022-11-16 12:18:46,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:46,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:18:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:18:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:18:46,067 INFO L87 Difference]: Start difference. First operand 382 states and 563 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:46,107 INFO L93 Difference]: Finished difference Result 399 states and 584 transitions. [2022-11-16 12:18:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:18:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-16 12:18:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:46,111 INFO L225 Difference]: With dead ends: 399 [2022-11-16 12:18:46,111 INFO L226 Difference]: Without dead ends: 392 [2022-11-16 12:18:46,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:18:46,114 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 17 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:46,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 391 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-16 12:18:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 386. [2022-11-16 12:18:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 348 states have (on average 1.4281609195402298) internal successors, (497), 352 states have internal predecessors, (497), 34 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (36), 35 states have call predecessors, (36), 32 states have call successors, (36) [2022-11-16 12:18:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 567 transitions. [2022-11-16 12:18:46,165 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 567 transitions. Word has length 42 [2022-11-16 12:18:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:46,166 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 567 transitions. [2022-11-16 12:18:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 567 transitions. [2022-11-16 12:18:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:18:46,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:46,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:46,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:18:46,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1246115090, now seen corresponding path program 1 times [2022-11-16 12:18:46,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:46,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536649708] [2022-11-16 12:18:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:46,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:46,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536649708] [2022-11-16 12:18:46,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536649708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:46,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:46,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:18:46,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135129438] [2022-11-16 12:18:46,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:46,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:18:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:18:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:18:46,284 INFO L87 Difference]: Start difference. First operand 386 states and 567 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:46,344 INFO L93 Difference]: Finished difference Result 393 states and 573 transitions. [2022-11-16 12:18:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:18:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-16 12:18:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:46,351 INFO L225 Difference]: With dead ends: 393 [2022-11-16 12:18:46,351 INFO L226 Difference]: Without dead ends: 386 [2022-11-16 12:18:46,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:18:46,353 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 5 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 512 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 [2022-11-16 12:18:46,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 512 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-16 12:18:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2022-11-16 12:18:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 344 states have (on average 1.4244186046511629) internal successors, (490), 348 states have internal predecessors, (490), 34 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (36), 35 states have call predecessors, (36), 32 states have call successors, (36) [2022-11-16 12:18:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 560 transitions. [2022-11-16 12:18:46,378 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 560 transitions. Word has length 42 [2022-11-16 12:18:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:46,383 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 560 transitions. [2022-11-16 12:18:46,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 560 transitions. [2022-11-16 12:18:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:18:46,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:46,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:46,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:18:46,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash -344054720, now seen corresponding path program 1 times [2022-11-16 12:18:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:46,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575135992] [2022-11-16 12:18:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:46,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575135992] [2022-11-16 12:18:46,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575135992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:46,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:46,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:18:46,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962581657] [2022-11-16 12:18:46,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:46,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:18:46,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:18:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:18:46,494 INFO L87 Difference]: Start difference. First operand 382 states and 560 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:46,552 INFO L93 Difference]: Finished difference Result 548 states and 803 transitions. [2022-11-16 12:18:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:18:46,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-16 12:18:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:46,557 INFO L225 Difference]: With dead ends: 548 [2022-11-16 12:18:46,557 INFO L226 Difference]: Without dead ends: 474 [2022-11-16 12:18:46,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:18:46,559 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 120 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:46,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 443 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-11-16 12:18:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 368. [2022-11-16 12:18:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 334 states have (on average 1.4131736526946108) internal successors, (472), 336 states have internal predecessors, (472), 30 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (32), 31 states have call predecessors, (32), 28 states have call successors, (32) [2022-11-16 12:18:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 534 transitions. [2022-11-16 12:18:46,592 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 534 transitions. Word has length 43 [2022-11-16 12:18:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:46,593 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 534 transitions. [2022-11-16 12:18:46,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 534 transitions. [2022-11-16 12:18:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:18:46,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:46,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:46,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:18:46,596 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1632371813, now seen corresponding path program 1 times [2022-11-16 12:18:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505284414] [2022-11-16 12:18:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:46,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:46,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505284414] [2022-11-16 12:18:46,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505284414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:46,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:46,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:18:46,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162305247] [2022-11-16 12:18:46,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:46,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:18:46,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:18:46,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:18:46,762 INFO L87 Difference]: Start difference. First operand 368 states and 534 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:47,022 INFO L93 Difference]: Finished difference Result 939 states and 1411 transitions. [2022-11-16 12:18:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:18:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-16 12:18:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:47,027 INFO L225 Difference]: With dead ends: 939 [2022-11-16 12:18:47,027 INFO L226 Difference]: Without dead ends: 781 [2022-11-16 12:18:47,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:18:47,029 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 166 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:47,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1099 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:18:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-16 12:18:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 467. [2022-11-16 12:18:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 432 states have (on average 1.4189814814814814) internal successors, (613), 433 states have internal predecessors, (613), 30 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (36), 33 states have call predecessors, (36), 28 states have call successors, (36) [2022-11-16 12:18:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 679 transitions. [2022-11-16 12:18:47,062 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 679 transitions. Word has length 43 [2022-11-16 12:18:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:47,063 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 679 transitions. [2022-11-16 12:18:47,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 679 transitions. [2022-11-16 12:18:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:18:47,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:47,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:47,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:18:47,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash 142635549, now seen corresponding path program 1 times [2022-11-16 12:18:47,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:47,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059288072] [2022-11-16 12:18:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:47,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:47,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059288072] [2022-11-16 12:18:47,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059288072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:47,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765218376] [2022-11-16 12:18:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:47,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:47,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:47,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:47,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:18:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:18:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:18:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:47,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765218376] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:47,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:18:47,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2022-11-16 12:18:47,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306195702] [2022-11-16 12:18:47,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:47,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:18:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:47,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:18:47,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:47,569 INFO L87 Difference]: Start difference. First operand 467 states and 679 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:47,637 INFO L93 Difference]: Finished difference Result 693 states and 999 transitions. [2022-11-16 12:18:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:18:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-16 12:18:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:47,641 INFO L225 Difference]: With dead ends: 693 [2022-11-16 12:18:47,641 INFO L226 Difference]: Without dead ends: 453 [2022-11-16 12:18:47,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:47,643 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 129 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:47,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 250 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-16 12:18:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 385. [2022-11-16 12:18:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 356 states have (on average 1.3848314606741574) internal successors, (493), 358 states have internal predecessors, (493), 24 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (30), 26 states have call predecessors, (30), 22 states have call successors, (30) [2022-11-16 12:18:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 547 transitions. [2022-11-16 12:18:47,698 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 547 transitions. Word has length 43 [2022-11-16 12:18:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:47,698 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 547 transitions. [2022-11-16 12:18:47,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 547 transitions. [2022-11-16 12:18:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:18:47,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:47,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:47,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:47,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:47,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash 794498825, now seen corresponding path program 1 times [2022-11-16 12:18:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:47,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689567625] [2022-11-16 12:18:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:47,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:18:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:48,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689567625] [2022-11-16 12:18:48,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689567625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:48,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:48,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:18:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940083111] [2022-11-16 12:18:48,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:48,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:18:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:48,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:18:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:18:48,016 INFO L87 Difference]: Start difference. First operand 385 states and 547 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:48,105 INFO L93 Difference]: Finished difference Result 602 states and 852 transitions. [2022-11-16 12:18:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:18:48,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-16 12:18:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:48,109 INFO L225 Difference]: With dead ends: 602 [2022-11-16 12:18:48,110 INFO L226 Difference]: Without dead ends: 562 [2022-11-16 12:18:48,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:18:48,111 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 118 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:48,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 449 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-16 12:18:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 419. [2022-11-16 12:18:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 389 states have (on average 1.3881748071979434) internal successors, (540), 390 states have internal predecessors, (540), 25 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (31), 27 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 12:18:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 596 transitions. [2022-11-16 12:18:48,150 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 596 transitions. Word has length 45 [2022-11-16 12:18:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:48,151 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 596 transitions. [2022-11-16 12:18:48,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 596 transitions. [2022-11-16 12:18:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:18:48,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:48,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:18:48,154 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -821437993, now seen corresponding path program 1 times [2022-11-16 12:18:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192257810] [2022-11-16 12:18:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:48,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:48,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192257810] [2022-11-16 12:18:48,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192257810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430920397] [2022-11-16 12:18:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:48,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:48,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:48,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:18:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:18:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:18:48,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:48,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430920397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:48,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:48,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2022-11-16 12:18:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876800079] [2022-11-16 12:18:48,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:18:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:18:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:18:48,956 INFO L87 Difference]: Start difference. First operand 419 states and 596 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 12:18:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:49,867 INFO L93 Difference]: Finished difference Result 747 states and 1070 transitions. [2022-11-16 12:18:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:18:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2022-11-16 12:18:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:49,874 INFO L225 Difference]: With dead ends: 747 [2022-11-16 12:18:49,874 INFO L226 Difference]: Without dead ends: 331 [2022-11-16 12:18:49,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:18:49,876 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 372 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:49,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1699 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:18:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-16 12:18:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 253. [2022-11-16 12:18:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 231 states have (on average 1.3766233766233766) internal successors, (318), 231 states have internal predecessors, (318), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (24), 19 states have call predecessors, (24), 15 states have call successors, (24) [2022-11-16 12:18:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 358 transitions. [2022-11-16 12:18:49,913 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 358 transitions. Word has length 46 [2022-11-16 12:18:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:49,914 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 358 transitions. [2022-11-16 12:18:49,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 12:18:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 358 transitions. [2022-11-16 12:18:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:18:49,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:49,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:49,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:50,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:18:50,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash 623707731, now seen corresponding path program 1 times [2022-11-16 12:18:50,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:50,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086288337] [2022-11-16 12:18:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:50,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:50,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:50,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086288337] [2022-11-16 12:18:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086288337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821033142] [2022-11-16 12:18:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:50,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:50,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:50,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:50,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:18:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:18:50,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:50,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:18:50,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821033142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:50,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:18:50,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-16 12:18:50,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347869677] [2022-11-16 12:18:50,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:50,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:18:50,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:18:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:18:50,589 INFO L87 Difference]: Start difference. First operand 253 states and 358 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:50,874 INFO L93 Difference]: Finished difference Result 416 states and 602 transitions. [2022-11-16 12:18:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:18:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-11-16 12:18:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:50,877 INFO L225 Difference]: With dead ends: 416 [2022-11-16 12:18:50,877 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:18:50,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:18:50,878 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 166 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:50,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 693 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:18:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:18:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2022-11-16 12:18:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 295 states have (on average 1.3694915254237288) internal successors, (404), 296 states have internal predecessors, (404), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (32), 27 states have call predecessors, (32), 23 states have call successors, (32) [2022-11-16 12:18:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 460 transitions. [2022-11-16 12:18:50,910 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 460 transitions. Word has length 48 [2022-11-16 12:18:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:50,911 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 460 transitions. [2022-11-16 12:18:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 460 transitions. [2022-11-16 12:18:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:18:50,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:50,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:50,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:18:51,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1324772309, now seen corresponding path program 1 times [2022-11-16 12:18:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430890691] [2022-11-16 12:18:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430890691] [2022-11-16 12:18:51,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430890691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:51,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:51,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:18:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013582662] [2022-11-16 12:18:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:18:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:18:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:18:51,185 INFO L87 Difference]: Start difference. First operand 325 states and 460 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:51,226 INFO L93 Difference]: Finished difference Result 338 states and 474 transitions. [2022-11-16 12:18:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:18:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-11-16 12:18:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:51,229 INFO L225 Difference]: With dead ends: 338 [2022-11-16 12:18:51,229 INFO L226 Difference]: Without dead ends: 277 [2022-11-16 12:18:51,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:18:51,230 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:51,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 375 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-16 12:18:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-11-16 12:18:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 247 states have (on average 1.3805668016194332) internal successors, (341), 250 states have internal predecessors, (341), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2022-11-16 12:18:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 392 transitions. [2022-11-16 12:18:51,254 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 392 transitions. Word has length 48 [2022-11-16 12:18:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:51,255 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 392 transitions. [2022-11-16 12:18:51,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 392 transitions. [2022-11-16 12:18:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:18:51,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:51,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:18:51,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 666439802, now seen corresponding path program 1 times [2022-11-16 12:18:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529567525] [2022-11-16 12:18:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:18:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:18:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529567525] [2022-11-16 12:18:51,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529567525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309700080] [2022-11-16 12:18:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:51,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:51,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:18:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:18:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:18:52,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:18:52,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309700080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:52,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:18:52,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2022-11-16 12:18:52,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915222427] [2022-11-16 12:18:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:18:52,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:18:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:18:52,015 INFO L87 Difference]: Start difference. First operand 277 states and 392 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:18:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:52,947 INFO L93 Difference]: Finished difference Result 771 states and 1112 transitions. [2022-11-16 12:18:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:18:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-11-16 12:18:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:52,951 INFO L225 Difference]: With dead ends: 771 [2022-11-16 12:18:52,951 INFO L226 Difference]: Without dead ends: 547 [2022-11-16 12:18:52,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:18:52,953 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 427 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:52,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1719 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:18:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-16 12:18:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 498. [2022-11-16 12:18:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 446 states have (on average 1.345291479820628) internal successors, (600), 450 states have internal predecessors, (600), 46 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (49), 47 states have call predecessors, (49), 43 states have call successors, (49) [2022-11-16 12:18:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 695 transitions. [2022-11-16 12:18:53,029 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 695 transitions. Word has length 49 [2022-11-16 12:18:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:53,029 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 695 transitions. [2022-11-16 12:18:53,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:18:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 695 transitions. [2022-11-16 12:18:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:18:53,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:53,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:53,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:53,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:18:53,238 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash -399453112, now seen corresponding path program 1 times [2022-11-16 12:18:53,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451047598] [2022-11-16 12:18:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:53,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:53,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:53,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:53,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:18:53,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:53,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451047598] [2022-11-16 12:18:53,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451047598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:53,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484746504] [2022-11-16 12:18:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:53,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:53,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:53,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:18:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:54,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:18:54,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:18:54,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:18:54,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484746504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:54,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:18:54,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2022-11-16 12:18:54,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702886606] [2022-11-16 12:18:54,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:54,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:18:54,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:18:54,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:18:54,375 INFO L87 Difference]: Start difference. First operand 498 states and 695 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:55,026 INFO L93 Difference]: Finished difference Result 904 states and 1292 transitions. [2022-11-16 12:18:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:18:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-16 12:18:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:55,030 INFO L225 Difference]: With dead ends: 904 [2022-11-16 12:18:55,030 INFO L226 Difference]: Without dead ends: 791 [2022-11-16 12:18:55,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:18:55,032 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 454 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:55,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1195 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:18:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-16 12:18:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 666. [2022-11-16 12:18:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 594 states have (on average 1.3451178451178452) internal successors, (799), 599 states have internal predecessors, (799), 66 states have call successors, (66), 3 states have call predecessors, (66), 5 states have return successors, (69), 68 states have call predecessors, (69), 63 states have call successors, (69) [2022-11-16 12:18:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 934 transitions. [2022-11-16 12:18:55,093 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 934 transitions. Word has length 50 [2022-11-16 12:18:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:55,093 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 934 transitions. [2022-11-16 12:18:55,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:55,094 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 934 transitions. [2022-11-16 12:18:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:18:55,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:55,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:55,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:55,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:18:55,303 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash 919990937, now seen corresponding path program 1 times [2022-11-16 12:18:55,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651219904] [2022-11-16 12:18:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:55,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:55,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651219904] [2022-11-16 12:18:55,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651219904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:55,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:55,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:18:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918179795] [2022-11-16 12:18:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:18:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:18:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:18:55,610 INFO L87 Difference]: Start difference. First operand 666 states and 934 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:56,384 INFO L93 Difference]: Finished difference Result 897 states and 1271 transitions. [2022-11-16 12:18:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:18:56,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-16 12:18:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:56,389 INFO L225 Difference]: With dead ends: 897 [2022-11-16 12:18:56,390 INFO L226 Difference]: Without dead ends: 879 [2022-11-16 12:18:56,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:56,391 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 289 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:56,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 762 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:18:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-16 12:18:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 702. [2022-11-16 12:18:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 626 states have (on average 1.3466453674121406) internal successors, (843), 632 states have internal predecessors, (843), 70 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (73), 72 states have call predecessors, (73), 67 states have call successors, (73) [2022-11-16 12:18:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 986 transitions. [2022-11-16 12:18:56,493 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 986 transitions. Word has length 52 [2022-11-16 12:18:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:56,494 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 986 transitions. [2022-11-16 12:18:56,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 986 transitions. [2022-11-16 12:18:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:18:56,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:56,497 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:56,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:18:56,497 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2113606340, now seen corresponding path program 1 times [2022-11-16 12:18:56,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:56,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718227687] [2022-11-16 12:18:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:56,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:56,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:56,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718227687] [2022-11-16 12:18:56,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718227687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:56,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:56,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:18:56,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362084316] [2022-11-16 12:18:56,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:56,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:18:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:18:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:18:56,563 INFO L87 Difference]: Start difference. First operand 702 states and 986 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:56,660 INFO L93 Difference]: Finished difference Result 711 states and 994 transitions. [2022-11-16 12:18:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:18:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-16 12:18:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:56,665 INFO L225 Difference]: With dead ends: 711 [2022-11-16 12:18:56,665 INFO L226 Difference]: Without dead ends: 676 [2022-11-16 12:18:56,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:18:56,666 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 1 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:56,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 372 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:18:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-16 12:18:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 654. [2022-11-16 12:18:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 584 states have (on average 1.345890410958904) internal successors, (786), 590 states have internal predecessors, (786), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-16 12:18:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 916 transitions. [2022-11-16 12:18:56,768 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 916 transitions. Word has length 52 [2022-11-16 12:18:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:56,769 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 916 transitions. [2022-11-16 12:18:56,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 916 transitions. [2022-11-16 12:18:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:18:56,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:56,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:18:56,771 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash -281868457, now seen corresponding path program 1 times [2022-11-16 12:18:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:56,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812835454] [2022-11-16 12:18:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:57,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:57,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:18:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:18:57,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812835454] [2022-11-16 12:18:57,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812835454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:57,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:57,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 12:18:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494251389] [2022-11-16 12:18:57,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:57,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:18:57,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:18:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:18:57,395 INFO L87 Difference]: Start difference. First operand 654 states and 916 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:18:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:58,187 INFO L93 Difference]: Finished difference Result 690 states and 958 transitions. [2022-11-16 12:18:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:18:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-11-16 12:18:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:58,191 INFO L225 Difference]: With dead ends: 690 [2022-11-16 12:18:58,192 INFO L226 Difference]: Without dead ends: 688 [2022-11-16 12:18:58,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:18:58,195 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 266 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:58,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1831 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:18:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-16 12:18:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 662. [2022-11-16 12:18:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 590 states have (on average 1.3440677966101695) internal successors, (793), 597 states have internal predecessors, (793), 65 states have call successors, (65), 4 states have call predecessors, (65), 6 states have return successors, (67), 65 states have call predecessors, (67), 62 states have call successors, (67) [2022-11-16 12:18:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 925 transitions. [2022-11-16 12:18:58,288 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 925 transitions. Word has length 52 [2022-11-16 12:18:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:58,289 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 925 transitions. [2022-11-16 12:18:58,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:18:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 925 transitions. [2022-11-16 12:18:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:18:58,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:58,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:58,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:18:58,292 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1671918490, now seen corresponding path program 1 times [2022-11-16 12:18:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285303557] [2022-11-16 12:18:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:58,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:18:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:18:58,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285303557] [2022-11-16 12:18:58,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285303557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566696957] [2022-11-16 12:18:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:58,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:58,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:58,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:58,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:18:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:18:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:18:59,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:18:59,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566696957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:59,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:18:59,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2022-11-16 12:18:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920842612] [2022-11-16 12:18:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:18:59,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:18:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:18:59,108 INFO L87 Difference]: Start difference. First operand 662 states and 925 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:59,444 INFO L93 Difference]: Finished difference Result 831 states and 1140 transitions. [2022-11-16 12:18:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:18:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-11-16 12:18:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:59,449 INFO L225 Difference]: With dead ends: 831 [2022-11-16 12:18:59,449 INFO L226 Difference]: Without dead ends: 776 [2022-11-16 12:18:59,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:18:59,451 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 308 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:59,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 425 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-16 12:18:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 662. [2022-11-16 12:18:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 590 states have (on average 1.3389830508474576) internal successors, (790), 597 states have internal predecessors, (790), 65 states have call successors, (65), 4 states have call predecessors, (65), 6 states have return successors, (67), 65 states have call predecessors, (67), 62 states have call successors, (67) [2022-11-16 12:18:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 922 transitions. [2022-11-16 12:18:59,552 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 922 transitions. Word has length 53 [2022-11-16 12:18:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:59,553 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 922 transitions. [2022-11-16 12:18:59,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:18:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 922 transitions. [2022-11-16 12:18:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:18:59,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:59,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:59,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:18:59,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:59,762 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1998787823, now seen corresponding path program 1 times [2022-11-16 12:18:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:59,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488674907] [2022-11-16 12:18:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:59,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:18:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:18:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488674907] [2022-11-16 12:18:59,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488674907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:59,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:59,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:18:59,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620249362] [2022-11-16 12:18:59,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:59,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:18:59,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:18:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:18:59,873 INFO L87 Difference]: Start difference. First operand 662 states and 922 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:00,019 INFO L93 Difference]: Finished difference Result 733 states and 1019 transitions. [2022-11-16 12:19:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:19:00,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-11-16 12:19:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:00,024 INFO L225 Difference]: With dead ends: 733 [2022-11-16 12:19:00,025 INFO L226 Difference]: Without dead ends: 731 [2022-11-16 12:19:00,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:19:00,026 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 41 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:00,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 655 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:19:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-16 12:19:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 676. [2022-11-16 12:19:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 597 states have (on average 1.3350083752093802) internal successors, (797), 610 states have internal predecessors, (797), 71 states have call successors, (71), 5 states have call predecessors, (71), 7 states have return successors, (73), 65 states have call predecessors, (73), 68 states have call successors, (73) [2022-11-16 12:19:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 941 transitions. [2022-11-16 12:19:00,139 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 941 transitions. Word has length 53 [2022-11-16 12:19:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:00,139 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 941 transitions. [2022-11-16 12:19:00,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 941 transitions. [2022-11-16 12:19:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:19:00,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:00,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:00,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:19:00,142 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1308977747, now seen corresponding path program 1 times [2022-11-16 12:19:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:00,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870111759] [2022-11-16 12:19:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:00,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:19:00,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:00,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870111759] [2022-11-16 12:19:00,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870111759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:00,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241555519] [2022-11-16 12:19:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:00,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:00,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:00,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:19:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:19:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:19:01,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:01,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241555519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:01,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:01,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 25 [2022-11-16 12:19:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171394770] [2022-11-16 12:19:01,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:01,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:19:01,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:01,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:19:01,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:19:01,202 INFO L87 Difference]: Start difference. First operand 676 states and 941 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:01,990 INFO L93 Difference]: Finished difference Result 1340 states and 1906 transitions. [2022-11-16 12:19:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:19:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-11-16 12:19:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:01,996 INFO L225 Difference]: With dead ends: 1340 [2022-11-16 12:19:01,996 INFO L226 Difference]: Without dead ends: 1055 [2022-11-16 12:19:01,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:19:01,999 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 336 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:01,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1710 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:19:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-16 12:19:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 791. [2022-11-16 12:19:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 709 states have (on average 1.317348377997179) internal successors, (934), 721 states have internal predecessors, (934), 73 states have call successors, (73), 5 states have call predecessors, (73), 8 states have return successors, (78), 69 states have call predecessors, (78), 70 states have call successors, (78) [2022-11-16 12:19:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1085 transitions. [2022-11-16 12:19:02,114 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1085 transitions. Word has length 54 [2022-11-16 12:19:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1085 transitions. [2022-11-16 12:19:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1085 transitions. [2022-11-16 12:19:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:19:02,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:02,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:02,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:02,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 12:19:02,323 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1615337446, now seen corresponding path program 1 times [2022-11-16 12:19:02,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:02,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217491864] [2022-11-16 12:19:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:02,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:19:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:19:02,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217491864] [2022-11-16 12:19:02,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217491864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:02,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958561630] [2022-11-16 12:19:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:02,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:02,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:02,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:02,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:19:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:19:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:19:02,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:02,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958561630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:02,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:02,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-16 12:19:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378333809] [2022-11-16 12:19:02,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:02,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:19:02,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:19:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:19:02,648 INFO L87 Difference]: Start difference. First operand 791 states and 1085 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:02,803 INFO L93 Difference]: Finished difference Result 1132 states and 1583 transitions. [2022-11-16 12:19:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:19:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-11-16 12:19:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:02,809 INFO L225 Difference]: With dead ends: 1132 [2022-11-16 12:19:02,809 INFO L226 Difference]: Without dead ends: 830 [2022-11-16 12:19:02,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:19:02,812 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:02,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 242 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:19:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-11-16 12:19:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 817. [2022-11-16 12:19:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 735 states have (on average 1.3061224489795917) internal successors, (960), 747 states have internal predecessors, (960), 73 states have call successors, (73), 5 states have call predecessors, (73), 8 states have return successors, (78), 69 states have call predecessors, (78), 70 states have call successors, (78) [2022-11-16 12:19:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1111 transitions. [2022-11-16 12:19:02,955 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1111 transitions. Word has length 54 [2022-11-16 12:19:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:02,955 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1111 transitions. [2022-11-16 12:19:02,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1111 transitions. [2022-11-16 12:19:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:19:02,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:02,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:02,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:19:03,165 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash -904622488, now seen corresponding path program 1 times [2022-11-16 12:19:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:03,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205129230] [2022-11-16 12:19:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:03,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:03,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:19:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205129230] [2022-11-16 12:19:03,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205129230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16178563] [2022-11-16 12:19:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:03,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:03,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:03,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:19:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 12:19:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:08,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16178563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:08,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:08,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 46 [2022-11-16 12:19:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935800918] [2022-11-16 12:19:08,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 12:19:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 12:19:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1928, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:19:08,150 INFO L87 Difference]: Start difference. First operand 817 states and 1111 transitions. Second operand has 46 states, 42 states have (on average 2.380952380952381) internal successors, (100), 38 states have internal predecessors, (100), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:19:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:14,224 INFO L93 Difference]: Finished difference Result 1482 states and 2037 transitions. [2022-11-16 12:19:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:19:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.380952380952381) internal successors, (100), 38 states have internal predecessors, (100), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2022-11-16 12:19:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:14,230 INFO L225 Difference]: With dead ends: 1482 [2022-11-16 12:19:14,230 INFO L226 Difference]: Without dead ends: 1333 [2022-11-16 12:19:14,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=413, Invalid=4417, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 12:19:14,234 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1066 mSDsluCounter, 3772 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 3940 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:14,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 3940 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2133 Invalid, 0 Unknown, 92 Unchecked, 4.1s Time] [2022-11-16 12:19:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-11-16 12:19:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 919. [2022-11-16 12:19:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 825 states have (on average 1.3054545454545454) internal successors, (1077), 837 states have internal predecessors, (1077), 83 states have call successors, (83), 6 states have call predecessors, (83), 10 states have return successors, (94), 80 states have call predecessors, (94), 80 states have call successors, (94) [2022-11-16 12:19:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1254 transitions. [2022-11-16 12:19:14,411 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1254 transitions. Word has length 54 [2022-11-16 12:19:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:14,412 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1254 transitions. [2022-11-16 12:19:14,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.380952380952381) internal successors, (100), 38 states have internal predecessors, (100), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:19:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1254 transitions. [2022-11-16 12:19:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:19:14,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:14,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:14,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:14,621 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash -975925848, now seen corresponding path program 1 times [2022-11-16 12:19:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:14,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191138055] [2022-11-16 12:19:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:15,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:19:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:15,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:15,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191138055] [2022-11-16 12:19:15,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191138055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:15,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320223173] [2022-11-16 12:19:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:15,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:15,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:15,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:19:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:19:15,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:16,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:36,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320223173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:36,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:36,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 43 [2022-11-16 12:19:36,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493554773] [2022-11-16 12:19:36,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:36,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:19:36,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:19:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:19:36,266 INFO L87 Difference]: Start difference. First operand 919 states and 1254 transitions. Second operand has 43 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 36 states have internal predecessors, (103), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:19:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:45,196 INFO L93 Difference]: Finished difference Result 1152 states and 1562 transitions. [2022-11-16 12:19:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:19:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 36 states have internal predecessors, (103), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2022-11-16 12:19:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:45,202 INFO L225 Difference]: With dead ends: 1152 [2022-11-16 12:19:45,203 INFO L226 Difference]: Without dead ends: 1114 [2022-11-16 12:19:45,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 12:19:45,206 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1018 mSDsluCounter, 4425 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 4599 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:45,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 4599 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 2945 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-16 12:19:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-11-16 12:19:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 999. [2022-11-16 12:19:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 897 states have (on average 1.3032329988851727) internal successors, (1169), 909 states have internal predecessors, (1169), 90 states have call successors, (90), 7 states have call predecessors, (90), 11 states have return successors, (101), 87 states have call predecessors, (101), 87 states have call successors, (101) [2022-11-16 12:19:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1360 transitions. [2022-11-16 12:19:45,401 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1360 transitions. Word has length 54 [2022-11-16 12:19:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:45,401 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 1360 transitions. [2022-11-16 12:19:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 36 states have internal predecessors, (103), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:19:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1360 transitions. [2022-11-16 12:19:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:19:45,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:45,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:45,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:45,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:19:45,611 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2008388118, now seen corresponding path program 1 times [2022-11-16 12:19:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:45,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303913718] [2022-11-16 12:19:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:45,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:19:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303913718] [2022-11-16 12:19:45,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303913718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:45,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:45,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:19:45,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887284207] [2022-11-16 12:19:45,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:45,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:19:45,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:19:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:19:45,650 INFO L87 Difference]: Start difference. First operand 999 states and 1360 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:45,839 INFO L93 Difference]: Finished difference Result 1674 states and 2293 transitions. [2022-11-16 12:19:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:19:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-11-16 12:19:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:45,844 INFO L225 Difference]: With dead ends: 1674 [2022-11-16 12:19:45,844 INFO L226 Difference]: Without dead ends: 1009 [2022-11-16 12:19:45,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:19:45,846 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:45,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 238 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:19:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-16 12:19:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1001. [2022-11-16 12:19:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 899 states have (on average 1.3025583982202447) internal successors, (1171), 911 states have internal predecessors, (1171), 90 states have call successors, (90), 7 states have call predecessors, (90), 11 states have return successors, (101), 87 states have call predecessors, (101), 87 states have call successors, (101) [2022-11-16 12:19:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1362 transitions. [2022-11-16 12:19:46,001 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1362 transitions. Word has length 55 [2022-11-16 12:19:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:46,001 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 1362 transitions. [2022-11-16 12:19:46,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1362 transitions. [2022-11-16 12:19:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:19:46,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:46,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:46,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 12:19:46,004 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1634253302, now seen corresponding path program 1 times [2022-11-16 12:19:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118649226] [2022-11-16 12:19:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:46,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 12:19:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118649226] [2022-11-16 12:19:46,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118649226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607556046] [2022-11-16 12:19:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:46,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:46,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:46,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:19:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 12:19:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:05,690 WARN L233 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 4883 DAG size of output: 4882 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 12:29:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:29:24,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:29:27,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607556046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:27,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:27,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 48 [2022-11-16 12:29:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944361994] [2022-11-16 12:29:27,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:27,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:29:27,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:29:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:29:27,739 INFO L87 Difference]: Start difference. First operand 1001 states and 1362 transitions. Second operand has 48 states, 46 states have (on average 2.369565217391304) internal successors, (109), 41 states have internal predecessors, (109), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:29:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:57,873 INFO L93 Difference]: Finished difference Result 2545 states and 3549 transitions. [2022-11-16 12:29:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:29:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.369565217391304) internal successors, (109), 41 states have internal predecessors, (109), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2022-11-16 12:29:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:57,885 INFO L225 Difference]: With dead ends: 2545 [2022-11-16 12:29:57,886 INFO L226 Difference]: Without dead ends: 2507 [2022-11-16 12:29:57,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=811, Invalid=9089, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 12:29:57,891 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 1447 mSDsluCounter, 14936 mSDsCounter, 0 mSdLazyCounter, 6334 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 15465 SdHoareTripleChecker+Invalid, 6958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 6334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:57,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 15465 Invalid, 6958 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 6334 Invalid, 0 Unknown, 176 Unchecked, 14.2s Time] [2022-11-16 12:29:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-11-16 12:29:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1114. [2022-11-16 12:29:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1004 states have (on average 1.295816733067729) internal successors, (1301), 1021 states have internal predecessors, (1301), 95 states have call successors, (95), 8 states have call predecessors, (95), 14 states have return successors, (114), 89 states have call predecessors, (114), 92 states have call successors, (114) [2022-11-16 12:29:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1510 transitions. [2022-11-16 12:29:58,153 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1510 transitions. Word has length 55 [2022-11-16 12:29:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:58,153 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1510 transitions. [2022-11-16 12:29:58,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.369565217391304) internal successors, (109), 41 states have internal predecessors, (109), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:29:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1510 transitions. [2022-11-16 12:29:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:29:58,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:58,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:58,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:58,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:29:58,364 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash 773880496, now seen corresponding path program 1 times [2022-11-16 12:29:58,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:58,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150966336] [2022-11-16 12:29:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:58,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:29:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:29:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:29:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:29:59,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150966336] [2022-11-16 12:29:59,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150966336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921121378] [2022-11-16 12:29:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:59,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:59,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:59,385 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:59,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:29:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:29:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:30:00,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:30:05,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921121378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:05,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:05,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 54 [2022-11-16 12:30:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110906136] [2022-11-16 12:30:05,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 12:30:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 12:30:05,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2691, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 12:30:05,493 INFO L87 Difference]: Start difference. First operand 1114 states and 1510 transitions. Second operand has 54 states, 51 states have (on average 2.156862745098039) internal successors, (110), 46 states have internal predecessors, (110), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:30:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:28,069 INFO L93 Difference]: Finished difference Result 4548 states and 6435 transitions. [2022-11-16 12:30:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:30:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 2.156862745098039) internal successors, (110), 46 states have internal predecessors, (110), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 55 [2022-11-16 12:30:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:28,089 INFO L225 Difference]: With dead ends: 4548 [2022-11-16 12:30:28,089 INFO L226 Difference]: Without dead ends: 4399 [2022-11-16 12:30:28,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3409 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1038, Invalid=12302, Unknown=0, NotChecked=0, Total=13340 [2022-11-16 12:30:28,096 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 2381 mSDsluCounter, 13320 mSDsCounter, 0 mSdLazyCounter, 6962 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 13805 SdHoareTripleChecker+Invalid, 7585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 6962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:28,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2403 Valid, 13805 Invalid, 7585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [623 Valid, 6962 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-16 12:30:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2022-11-16 12:30:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 1173. [2022-11-16 12:30:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1062 states have (on average 1.2909604519774012) internal successors, (1371), 1078 states have internal predecessors, (1371), 96 states have call successors, (96), 8 states have call predecessors, (96), 14 states have return successors, (120), 91 states have call predecessors, (120), 93 states have call successors, (120) [2022-11-16 12:30:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1587 transitions. [2022-11-16 12:30:28,451 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1587 transitions. Word has length 55 [2022-11-16 12:30:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:28,451 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1587 transitions. [2022-11-16 12:30:28,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 2.156862745098039) internal successors, (110), 46 states have internal predecessors, (110), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:30:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1587 transitions. [2022-11-16 12:30:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 12:30:28,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:28,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:28,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:28,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:30:28,662 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1721420686, now seen corresponding path program 1 times [2022-11-16 12:30:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:28,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987764518] [2022-11-16 12:30:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:30:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:30:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:30:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:29,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987764518] [2022-11-16 12:30:29,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987764518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811861528] [2022-11-16 12:30:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:29,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:29,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:29,357 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:29,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:30:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:30:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:30:29,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811861528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:29,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:29,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20] total 29 [2022-11-16 12:30:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750921515] [2022-11-16 12:30:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:30:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:30:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:30:29,761 INFO L87 Difference]: Start difference. First operand 1173 states and 1587 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:30:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:30,676 INFO L93 Difference]: Finished difference Result 1409 states and 1937 transitions. [2022-11-16 12:30:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:30:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-11-16 12:30:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:30,684 INFO L225 Difference]: With dead ends: 1409 [2022-11-16 12:30:30,684 INFO L226 Difference]: Without dead ends: 1343 [2022-11-16 12:30:30,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:30:30,686 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 216 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:30,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1303 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:30:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-11-16 12:30:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1069. [2022-11-16 12:30:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 971 states have (on average 1.2873326467559216) internal successors, (1250), 985 states have internal predecessors, (1250), 84 states have call successors, (84), 8 states have call predecessors, (84), 13 states have return successors, (106), 79 states have call predecessors, (106), 81 states have call successors, (106) [2022-11-16 12:30:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1440 transitions. [2022-11-16 12:30:30,923 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1440 transitions. Word has length 56 [2022-11-16 12:30:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:30,923 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1440 transitions. [2022-11-16 12:30:30,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:30:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1440 transitions. [2022-11-16 12:30:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 12:30:30,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:30,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:30,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:31,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:30:31,128 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:30:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:31,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1842920697, now seen corresponding path program 1 times [2022-11-16 12:30:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:31,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346327677] [2022-11-16 12:30:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:31,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:30:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:30:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:30:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:30:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346327677] [2022-11-16 12:30:32,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346327677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305612974] [2022-11-16 12:30:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:32,958 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:33,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e44b9f82-ae24-425c-94d3-057f81e1dbdb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:30:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 12:30:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:36,085 WARN L233 SmtUtils]: Spent 59.27s on a formula simplification. DAG size of input: 10267 DAG size of output: 8417 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)