./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN --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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- 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-6b4ec56 [2022-11-20 12:03:43,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:03:43,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:03:43,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:03:43,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:03:43,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:03:43,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:03:43,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:03:43,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:03:43,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:03:43,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:03:43,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:03:43,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:03:43,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:03:43,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:03:43,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:03:43,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:03:43,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:03:43,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:03:43,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:03:43,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:03:43,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:03:43,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:03:43,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:03:43,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:03:43,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:03:43,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:03:43,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:03:43,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:03:43,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:03:43,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:03:43,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:03:43,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:03:43,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:03:43,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:03:43,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:03:43,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:03:43,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:03:43,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:03:43,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:03:43,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:03:43,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:03:43,333 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:03:43,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:03:43,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:03:43,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:03:43,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:03:43,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:03:43,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:03:43,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:03:43,338 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:03:43,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:03:43,339 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:03:43,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:03:43,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:03:43,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:03:43,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:03:43,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:03:43,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:03:43,342 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:03:43,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:03:43,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:03:43,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:03:43,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:03:43,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:03:43,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:03:43,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:03:43,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:03:43,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:03:43,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:03:43,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:03:43,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:03:43,345 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:03:43,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:03:43,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:03:43,346 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_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2022-11-20 12:03:43,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:03:43,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:03:43,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:03:43,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:03:43,675 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:03:43,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-11-20 12:03:46,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:03:46,975 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:03:46,975 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-11-20 12:03:46,985 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/data/3b1619e68/f6b1ca42ac6f45448d31797d0455b3df/FLAG3f90c05ef [2022-11-20 12:03:46,998 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/data/3b1619e68/f6b1ca42ac6f45448d31797d0455b3df [2022-11-20 12:03:47,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:03:47,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:03:47,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:03:47,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:03:47,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:03:47,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71802fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47, skipping insertion in model container [2022-11-20 12:03:47,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:03:47,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:03:47,179 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-11-20 12:03:47,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:03:47,221 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:03:47,230 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-11-20 12:03:47,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:03:47,254 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:03:47,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47 WrapperNode [2022-11-20 12:03:47,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:03:47,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:03:47,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:03:47,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:03:47,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,291 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-20 12:03:47,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:03:47,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:03:47,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:03:47,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:03:47,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,312 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:03:47,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:03:47,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:03:47,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:03:47,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (1/1) ... [2022-11-20 12:03:47,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:03:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:47,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:03:47,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:03:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:03:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 12:03:47,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 12:03:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:03:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:03:47,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:03:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 12:03:47,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 12:03:47,461 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:03:47,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:03:47,628 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:03:47,634 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:03:47,634 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:03:47,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:03:47 BoogieIcfgContainer [2022-11-20 12:03:47,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:03:47,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:03:47,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:03:47,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:03:47,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:03:47" (1/3) ... [2022-11-20 12:03:47,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25221d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:03:47, skipping insertion in model container [2022-11-20 12:03:47,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:03:47" (2/3) ... [2022-11-20 12:03:47,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25221d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:03:47, skipping insertion in model container [2022-11-20 12:03:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:03:47" (3/3) ... [2022-11-20 12:03:47,646 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2022-11-20 12:03:47,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:03:47,667 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:03:47,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:03:47,728 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;@4a576db4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:03:47,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:03:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 12:03:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 12:03:47,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:47,744 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:03:47,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-11-20 12:03:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:47,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392206949] [2022-11-20 12:03:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:47,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:47,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392206949] [2022-11-20 12:03:47,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 12:03:47,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647053764] [2022-11-20 12:03:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:47,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:48,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:03:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:48,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 12:03:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 12:03:48,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:03:48,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647053764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:03:48,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:03:48,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:03:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082543821] [2022-11-20 12:03:48,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:03:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:03:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:03:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:03:48,263 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:03:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:48,311 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-11-20 12:03:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:03:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-20 12:03:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:48,323 INFO L225 Difference]: With dead ends: 67 [2022-11-20 12:03:48,323 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 12:03:48,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:03:48,330 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:48,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:03:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 12:03:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 12:03:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 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) [2022-11-20 12:03:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-20 12:03:48,386 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-11-20 12:03:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:48,388 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-20 12:03:48,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:03:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-20 12:03:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:03:48,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:48,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:03:48,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:03:48,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 12:03:48,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:48,599 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-11-20 12:03:48,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:48,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093096475] [2022-11-20 12:03:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:48,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:48,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:48,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824024680] [2022-11-20 12:03:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:48,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:48,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:48,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:03:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:03:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:03:48,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:03:49,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093096475] [2022-11-20 12:03:49,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824024680] [2022-11-20 12:03:49,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824024680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:49,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:03:49,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-20 12:03:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659134530] [2022-11-20 12:03:49,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:49,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:03:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:03:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:03:49,014 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:03:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:49,139 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-11-20 12:03:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:03:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-11-20 12:03:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:49,140 INFO L225 Difference]: With dead ends: 48 [2022-11-20 12:03:49,141 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 12:03:49,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:03:49,142 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:49,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:03:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 12:03:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-20 12:03:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-11-20 12:03:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-20 12:03:49,159 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-11-20 12:03:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:49,160 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-20 12:03:49,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 12:03:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-20 12:03:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:03:49,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:49,162 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:03:49,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:49,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:49,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-11-20 12:03:49,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:49,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948218849] [2022-11-20 12:03:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:49,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:49,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:49,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102157555] [2022-11-20 12:03:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:49,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:49,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:49,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:03:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:49,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 12:03:49,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:03:49,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 12:03:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948218849] [2022-11-20 12:03:49,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102157555] [2022-11-20 12:03:49,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102157555] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:49,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:03:49,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-20 12:03:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690485564] [2022-11-20 12:03:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:03:49,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:03:49,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:03:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:03:49,695 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 12:03:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:49,757 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-20 12:03:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:03:49,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-20 12:03:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:49,759 INFO L225 Difference]: With dead ends: 39 [2022-11-20 12:03:49,760 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 12:03:49,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:03:49,761 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:49,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:03:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 12:03:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 12:03:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 12:03:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-20 12:03:49,773 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-11-20 12:03:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:49,773 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-20 12:03:49,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 12:03:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-20 12:03:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:03:49,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:49,775 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-11-20 12:03:49,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:49,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 12:03:49,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-11-20 12:03:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:49,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385903273] [2022-11-20 12:03:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:49,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:49,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290401357] [2022-11-20 12:03:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:49,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:50,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:50,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:50,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:03:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:50,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:03:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:03:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 12:03:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385903273] [2022-11-20 12:03:50,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290401357] [2022-11-20 12:03:50,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290401357] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:50,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:03:50,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-20 12:03:50,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742009722] [2022-11-20 12:03:50,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:03:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:03:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:03:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:03:50,518 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 12:03:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:50,589 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-11-20 12:03:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:03:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-20 12:03:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:50,591 INFO L225 Difference]: With dead ends: 50 [2022-11-20 12:03:50,591 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 12:03:50,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:03:50,593 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:50,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:03:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 12:03:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-20 12:03:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 12:03:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-20 12:03:50,606 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-11-20 12:03:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:50,607 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-20 12:03:50,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 12:03:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-20 12:03:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 12:03:50,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:50,608 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2022-11-20 12:03:50,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:50,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:50,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-11-20 12:03:50,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:50,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957398825] [2022-11-20 12:03:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:50,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:50,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579450476] [2022-11-20 12:03:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:50,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:50,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:50,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:50,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:03:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:03:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 12:03:51,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 12:03:51,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:51,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957398825] [2022-11-20 12:03:51,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579450476] [2022-11-20 12:03:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579450476] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:51,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:03:51,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-20 12:03:51,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452916914] [2022-11-20 12:03:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:03:51,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:03:51,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:03:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:03:51,304 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 12:03:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:51,384 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-20 12:03:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:03:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-20 12:03:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:51,386 INFO L225 Difference]: With dead ends: 54 [2022-11-20 12:03:51,386 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 12:03:51,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:03:51,388 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:51,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:03:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 12:03:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-20 12:03:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 12:03:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-20 12:03:51,402 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-11-20 12:03:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:51,402 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-20 12:03:51,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 12:03:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-20 12:03:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 12:03:51,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:51,404 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 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] [2022-11-20 12:03:51,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:51,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-11-20 12:03:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:51,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806566858] [2022-11-20 12:03:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:51,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392926331] [2022-11-20 12:03:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:51,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:51,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:51,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:03:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 12:03:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 12:03:52,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:52,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806566858] [2022-11-20 12:03:52,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392926331] [2022-11-20 12:03:52,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392926331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:03:52,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:03:52,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-20 12:03:52,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098136217] [2022-11-20 12:03:52,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:03:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:03:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:03:52,286 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 12:03:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:52,574 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-20 12:03:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:03:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-11-20 12:03:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:52,575 INFO L225 Difference]: With dead ends: 60 [2022-11-20 12:03:52,576 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 12:03:52,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:03:52,577 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:52,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:03:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 12:03:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-20 12:03:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 12:03:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-20 12:03:52,593 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-11-20 12:03:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:52,593 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-20 12:03:52,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 12:03:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-20 12:03:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 12:03:52,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:52,595 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-20 12:03:52,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:52,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-11-20 12:03:52,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:52,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282800173] [2022-11-20 12:03:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:52,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:52,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:52,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111196804] [2022-11-20 12:03:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:52,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:52,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:52,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:52,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:03:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:03:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 12:03:52,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 12:03:53,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:53,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282800173] [2022-11-20 12:03:53,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111196804] [2022-11-20 12:03:53,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111196804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:53,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:03:53,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-20 12:03:53,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520683095] [2022-11-20 12:03:53,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:53,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:03:53,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:53,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:03:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:03:53,101 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 12:03:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:53,422 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-11-20 12:03:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:03:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-11-20 12:03:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:53,426 INFO L225 Difference]: With dead ends: 102 [2022-11-20 12:03:53,426 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 12:03:53,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:03:53,429 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:53,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:03:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 12:03:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-20 12:03:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-20 12:03:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-11-20 12:03:53,468 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-11-20 12:03:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:53,470 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-11-20 12:03:53,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 12:03:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-11-20 12:03:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 12:03:53,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:53,479 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2022-11-20 12:03:53,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 12:03:53,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-11-20 12:03:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698103419] [2022-11-20 12:03:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:53,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:53,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440093178] [2022-11-20 12:03:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:53,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:53,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:53,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:53,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:03:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:03:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 12:03:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 12:03:54,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:03:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-20 12:03:54,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:03:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698103419] [2022-11-20 12:03:54,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:03:54,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440093178] [2022-11-20 12:03:54,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440093178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:54,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:03:54,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-11-20 12:03:54,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860774183] [2022-11-20 12:03:54,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:54,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:03:54,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:03:54,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:03:54,221 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-20 12:03:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:03:55,149 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-11-20 12:03:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:03:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2022-11-20 12:03:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:03:55,152 INFO L225 Difference]: With dead ends: 128 [2022-11-20 12:03:55,152 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 12:03:55,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:03:55,153 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:03:55,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 203 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:03:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 12:03:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-11-20 12:03:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-20 12:03:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-11-20 12:03:55,202 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-11-20 12:03:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:03:55,203 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-11-20 12:03:55,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-20 12:03:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-11-20 12:03:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 12:03:55,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:03:55,204 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 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] [2022-11-20 12:03:55,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:03:55,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:55,411 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:03:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:03:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-11-20 12:03:55,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:03:55,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379867469] [2022-11-20 12:03:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:03:55,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:03:55,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:03:55,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880316253] [2022-11-20 12:03:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:03:55,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:03:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:03:55,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:03:55,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:03:55,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:03:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:03:55,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:03:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:03:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 12:03:56,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:04:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:03,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379867469] [2022-11-20 12:04:03,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:04:03,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880316253] [2022-11-20 12:04:03,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880316253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:04:03,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:04:03,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-20 12:04:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881424591] [2022-11-20 12:04:03,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 12:04:03,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:04:03,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:04:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:04:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=228, Unknown=2, NotChecked=0, Total=272 [2022-11-20 12:04:03,469 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 12:04:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:04:04,230 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2022-11-20 12:04:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:04:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2022-11-20 12:04:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:04:04,234 INFO L225 Difference]: With dead ends: 124 [2022-11-20 12:04:04,234 INFO L226 Difference]: Without dead ends: 122 [2022-11-20 12:04:04,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=67, Invalid=351, Unknown=2, NotChecked=0, Total=420 [2022-11-20 12:04:04,238 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:04:04,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 158 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:04:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-20 12:04:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-11-20 12:04:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-20 12:04:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-11-20 12:04:04,287 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2022-11-20 12:04:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:04:04,288 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-11-20 12:04:04,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 12:04:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-11-20 12:04:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 12:04:04,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:04:04,289 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 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] [2022-11-20 12:04:04,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:04:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:04:04,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:04:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:04:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-11-20 12:04:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:04:04,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656903389] [2022-11-20 12:04:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:04,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:04:04,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:04:04,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057194831] [2022-11-20 12:04:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:04:04,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:04,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:04,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:04:04,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:04:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:04:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 12:04:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:04:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 12:04:05,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:04:06,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656903389] [2022-11-20 12:04:06,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:04:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057194831] [2022-11-20 12:04:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057194831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:04:06,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:04:06,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-20 12:04:06,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60449592] [2022-11-20 12:04:06,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 12:04:06,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:04:06,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:04:06,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:04:06,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:04:06,249 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-20 12:04:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:04:06,924 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2022-11-20 12:04:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:04:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-11-20 12:04:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:04:06,928 INFO L225 Difference]: With dead ends: 128 [2022-11-20 12:04:06,929 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 12:04:06,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:04:06,930 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:04:06,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 184 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:04:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 12:04:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-11-20 12:04:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-20 12:04:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2022-11-20 12:04:06,986 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2022-11-20 12:04:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:04:06,989 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2022-11-20 12:04:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-20 12:04:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2022-11-20 12:04:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 12:04:06,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:04:06,990 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 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] [2022-11-20 12:04:06,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:04:07,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:04:07,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:04:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:04:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-11-20 12:04:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:04:07,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039369049] [2022-11-20 12:04:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:04:07,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:04:07,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985038701] [2022-11-20 12:04:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:07,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:07,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:07,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:04:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 12:04:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:04:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-20 12:04:07,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:04:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-20 12:04:08,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039369049] [2022-11-20 12:04:08,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:04:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985038701] [2022-11-20 12:04:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985038701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:04:08,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:04:08,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-20 12:04:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483353263] [2022-11-20 12:04:08,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:04:08,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:04:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:04:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:04:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:04:08,996 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 12:04:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:04:20,400 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2022-11-20 12:04:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:04:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2022-11-20 12:04:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:04:20,403 INFO L225 Difference]: With dead ends: 208 [2022-11-20 12:04:20,403 INFO L226 Difference]: Without dead ends: 204 [2022-11-20 12:04:20,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 12:04:20,405 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 101 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:04:20,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 398 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 12:04:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-20 12:04:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2022-11-20 12:04:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 12:04:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2022-11-20 12:04:20,508 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2022-11-20 12:04:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:04:20,509 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2022-11-20 12:04:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 12:04:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2022-11-20 12:04:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 12:04:20,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:04:20,511 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 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] [2022-11-20 12:04:20,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:04:20,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:20,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:04:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:04:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2022-11-20 12:04:20,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:04:20,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222753523] [2022-11-20 12:04:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:20,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:04:20,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:04:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639003399] [2022-11-20 12:04:20,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:04:20,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:20,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:20,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:04:20,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:04:20,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:04:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:04:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:04:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-20 12:04:20,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:04:20,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222753523] [2022-11-20 12:04:20,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:04:20,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639003399] [2022-11-20 12:04:20,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639003399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:04:20,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:04:20,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:04:20,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226211636] [2022-11-20 12:04:20,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:04:20,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:04:20,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:04:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:04:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:04:20,889 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 12:04:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:04:21,048 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2022-11-20 12:04:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:04:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2022-11-20 12:04:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:04:21,051 INFO L225 Difference]: With dead ends: 253 [2022-11-20 12:04:21,051 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 12:04:21,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:04:21,052 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:04:21,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:04:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 12:04:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2022-11-20 12:04:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-20 12:04:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2022-11-20 12:04:21,117 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2022-11-20 12:04:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:04:21,117 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2022-11-20 12:04:21,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 12:04:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2022-11-20 12:04:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 12:04:21,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:04:21,119 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 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] [2022-11-20 12:04:21,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:04:21,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:04:21,323 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:04:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:04:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-11-20 12:04:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:04:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855129208] [2022-11-20 12:04:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:04:21,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:04:21,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948074692] [2022-11-20 12:04:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:04:21,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:04:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:04:21,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:04:21,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:04:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:04:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 12:04:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:04:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-20 12:04:22,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:04:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-20 12:04:24,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:04:24,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855129208] [2022-11-20 12:04:24,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:04:24,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948074692] [2022-11-20 12:04:24,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948074692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:04:24,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:04:24,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-20 12:04:24,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839089297] [2022-11-20 12:04:24,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:04:24,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 12:04:24,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:04:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 12:04:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:04:24,277 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 12:04:34,650 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:04:52,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:05:01,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:05:03,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:05:08,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:05:12,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:05:18,318 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:05:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:19,079 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2022-11-20 12:05:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:05:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2022-11-20 12:05:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:19,081 INFO L225 Difference]: With dead ends: 209 [2022-11-20 12:05:19,082 INFO L226 Difference]: Without dead ends: 207 [2022-11-20 12:05:19,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:05:19,083 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 122 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 175 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:19,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 176 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 971 Invalid, 5 Unknown, 0 Unchecked, 22.2s Time] [2022-11-20 12:05:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-20 12:05:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2022-11-20 12:05:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-20 12:05:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2022-11-20 12:05:19,185 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2022-11-20 12:05:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:19,185 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2022-11-20 12:05:19,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 12:05:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2022-11-20 12:05:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 12:05:19,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:19,187 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2022-11-20 12:05:19,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:19,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:19,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2022-11-20 12:05:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:19,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831754661] [2022-11-20 12:05:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:19,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:19,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:19,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801754281] [2022-11-20 12:05:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:05:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:19,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:19,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:05:19,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:05:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:05:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 12:05:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-20 12:05:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-20 12:05:21,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831754661] [2022-11-20 12:05:21,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801754281] [2022-11-20 12:05:21,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801754281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:21,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:05:21,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-11-20 12:05:21,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796609942] [2022-11-20 12:05:21,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:21,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 12:05:21,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 12:05:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:05:21,283 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-20 12:05:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:55,808 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2022-11-20 12:05:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 12:05:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2022-11-20 12:05:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:55,811 INFO L225 Difference]: With dead ends: 278 [2022-11-20 12:05:55,811 INFO L226 Difference]: Without dead ends: 276 [2022-11-20 12:05:55,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 12:05:55,813 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 114 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 288 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2022-11-20 12:05:55,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-20 12:05:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2022-11-20 12:05:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-20 12:05:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2022-11-20 12:05:55,996 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2022-11-20 12:05:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:55,996 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2022-11-20 12:05:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-20 12:05:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2022-11-20 12:05:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:05:55,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:55,999 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:56,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:56,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:56,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2022-11-20 12:05:56,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:56,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089210612] [2022-11-20 12:05:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:56,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726799857] [2022-11-20 12:05:56,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:05:56,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:56,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:56,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:05:56,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:05:56,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:05:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 12:05:56,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-11-20 12:05:56,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-11-20 12:05:57,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089210612] [2022-11-20 12:05:57,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726799857] [2022-11-20 12:05:57,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726799857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:57,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:05:57,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2022-11-20 12:05:57,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474619093] [2022-11-20 12:05:57,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:05:57,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:05:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:05:57,318 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 12:05:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:59,767 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2022-11-20 12:05:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:05:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 123 [2022-11-20 12:05:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:59,770 INFO L225 Difference]: With dead ends: 283 [2022-11-20 12:05:59,770 INFO L226 Difference]: Without dead ends: 281 [2022-11-20 12:05:59,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:05:59,771 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:59,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 273 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 12:05:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-20 12:05:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2022-11-20 12:05:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-20 12:05:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2022-11-20 12:05:59,999 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2022-11-20 12:06:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:00,000 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2022-11-20 12:06:00,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 12:06:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2022-11-20 12:06:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 12:06:00,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:00,003 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:00,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:00,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:06:00,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:00,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:00,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2022-11-20 12:06:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085177478] [2022-11-20 12:06:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:00,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:06:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117683551] [2022-11-20 12:06:00,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:06:00,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:00,220 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:00,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:06:00,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:06:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:00,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 12:06:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 61 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-20 12:06:01,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-11-20 12:06:03,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:03,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085177478] [2022-11-20 12:06:03,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:06:03,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117683551] [2022-11-20 12:06:03,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117683551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:03,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:06:03,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2022-11-20 12:06:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338120879] [2022-11-20 12:06:03,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:03,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 12:06:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 12:06:03,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:06:03,855 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-20 12:06:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:06:40,339 INFO L93 Difference]: Finished difference Result 377 states and 531 transitions. [2022-11-20 12:06:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 12:06:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 134 [2022-11-20 12:06:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:06:40,343 INFO L225 Difference]: With dead ends: 377 [2022-11-20 12:06:40,343 INFO L226 Difference]: Without dead ends: 369 [2022-11-20 12:06:40,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=963, Invalid=4293, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 12:06:40,345 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 215 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:06:40,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 677 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2022-11-20 12:06:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-20 12:06:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 351. [2022-11-20 12:06:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 193 states have internal predecessors, (216), 140 states have call successors, (140), 23 states have call predecessors, (140), 23 states have return successors, (139), 134 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-20 12:06:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 495 transitions. [2022-11-20 12:06:40,771 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 495 transitions. Word has length 134 [2022-11-20 12:06:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:06:40,771 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 495 transitions. [2022-11-20 12:06:40,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-20 12:06:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 495 transitions. [2022-11-20 12:06:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 12:06:40,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:06:40,775 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:40,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:40,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:06:40,986 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:06:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2022-11-20 12:06:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:40,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408164818] [2022-11-20 12:06:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:40,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:06:40,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338612628] [2022-11-20 12:06:40,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:06:40,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:40,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:40,998 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:41,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:06:41,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:06:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 12:06:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 83 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-11-20 12:06:44,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:07:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 138 proven. 65 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-11-20 12:07:06,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:07:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408164818] [2022-11-20 12:07:06,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:07:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338612628] [2022-11-20 12:07:06,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338612628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:07:06,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:07:06,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2022-11-20 12:07:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076040678] [2022-11-20 12:07:06,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:07:06,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 12:07:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:07:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 12:07:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=896, Unknown=1, NotChecked=0, Total=1122 [2022-11-20 12:07:06,380 INFO L87 Difference]: Start difference. First operand 351 states and 495 transitions. Second operand has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) [2022-11-20 12:07:08,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:07:34,498 WARN L233 SmtUtils]: Spent 18.11s on a formula simplification. DAG size of input: 141 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:08:12,747 WARN L233 SmtUtils]: Spent 37.33s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:08:14,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:08:16,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:08:42,334 WARN L233 SmtUtils]: Spent 24.62s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:08:44,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:09:08,189 WARN L233 SmtUtils]: Spent 22.02s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:09:55,050 WARN L233 SmtUtils]: Spent 46.44s on a formula simplification. DAG size of input: 140 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:09:57,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:09:59,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:02,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:04,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:06,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:08,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:10,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:15,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:10:40,788 WARN L233 SmtUtils]: Spent 20.18s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:10:42,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:11:17,798 WARN L233 SmtUtils]: Spent 33.79s on a formula simplification. DAG size of input: 116 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:11:19,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:11:22,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:11:42,983 WARN L233 SmtUtils]: Spent 20.66s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:11:46,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:11:52,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:11:55,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:12:03,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:13:27,366 WARN L233 SmtUtils]: Spent 1.36m on a formula simplification that was a NOOP. DAG size: 134 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:13:39,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:13:41,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:13:43,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:13:46,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:13:48,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:13:51,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:14:10,365 WARN L233 SmtUtils]: Spent 10.57s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:14:12,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:14:14,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:14:30,309 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:14:32,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:14:52,804 WARN L233 SmtUtils]: Spent 12.99s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:14:54,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:14:56,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:14:58,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:00,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:01,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:04,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:23,520 WARN L233 SmtUtils]: Spent 14.68s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:25,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:44,865 WARN L233 SmtUtils]: Spent 18.93s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:46,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:48,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:15:50,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:16:05,466 WARN L233 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:16:08,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:29,442 WARN L233 SmtUtils]: Spent 1.28m on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:17:31,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:33,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:38,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:40,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:42,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:44,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:17:46,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:29,873 WARN L233 SmtUtils]: Spent 41.66s on a formula simplification. DAG size of input: 130 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:18:31,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:36,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:38,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:42,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:44,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:46,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:48,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:50,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 12:18:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:52,979 INFO L93 Difference]: Finished difference Result 456 states and 652 transitions. [2022-11-20 12:18:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 12:18:52,980 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) Word has length 150 [2022-11-20 12:18:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:52,983 INFO L225 Difference]: With dead ends: 456 [2022-11-20 12:18:52,983 INFO L226 Difference]: Without dead ends: 454 [2022-11-20 12:18:52,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 577.5s TimeCoverageRelationStatistics Valid=1020, Invalid=2992, Unknown=20, NotChecked=0, Total=4032 [2022-11-20 12:18:52,985 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 234 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 373 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:52,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 273 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1791 Invalid, 40 Unknown, 0 Unchecked, 137.4s Time] [2022-11-20 12:18:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-20 12:18:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 402. [2022-11-20 12:18:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 215 states have (on average 1.158139534883721) internal successors, (249), 221 states have internal predecessors, (249), 160 states have call successors, (160), 26 states have call predecessors, (160), 26 states have return successors, (159), 154 states have call predecessors, (159), 159 states have call successors, (159) [2022-11-20 12:18:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 568 transitions. [2022-11-20 12:18:53,698 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 568 transitions. Word has length 150 [2022-11-20 12:18:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:53,699 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 568 transitions. [2022-11-20 12:18:53,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) [2022-11-20 12:18:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 568 transitions. [2022-11-20 12:18:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-20 12:18:53,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:53,702 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:53,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:18:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:18:53,909 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2022-11-20 12:18:53,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:53,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245714243] [2022-11-20 12:18:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:53,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:53,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:18:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984130448] [2022-11-20 12:18:53,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:18:53,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:53,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:53,928 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:53,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:18:54,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:18:54,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:18:54,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:18:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:18:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 99 proven. 31 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2022-11-20 12:18:54,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:18:57,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:18:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245714243] [2022-11-20 12:18:57,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:18:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984130448] [2022-11-20 12:18:57,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984130448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:18:57,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:18:57,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-20 12:18:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065067592] [2022-11-20 12:18:57,381 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 12:18:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:18:57,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:18:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:18:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2022-11-20 12:18:57,382 INFO L87 Difference]: Start difference. First operand 402 states and 568 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 12:18:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:18:58,733 INFO L93 Difference]: Finished difference Result 448 states and 630 transitions. [2022-11-20 12:18:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:18:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2022-11-20 12:18:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:18:58,736 INFO L225 Difference]: With dead ends: 448 [2022-11-20 12:18:58,737 INFO L226 Difference]: Without dead ends: 441 [2022-11-20 12:18:58,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2022-11-20 12:18:58,738 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:18:58,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 139 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:18:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-20 12:18:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 422. [2022-11-20 12:18:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 225 states have (on average 1.1511111111111112) internal successors, (259), 231 states have internal predecessors, (259), 168 states have call successors, (168), 28 states have call predecessors, (168), 28 states have return successors, (167), 162 states have call predecessors, (167), 167 states have call successors, (167) [2022-11-20 12:18:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 594 transitions. [2022-11-20 12:18:59,446 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 594 transitions. Word has length 153 [2022-11-20 12:18:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:18:59,447 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 594 transitions. [2022-11-20 12:18:59,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 12:18:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 594 transitions. [2022-11-20 12:18:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-20 12:18:59,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:18:59,451 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:18:59,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:18:59,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:18:59,657 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:18:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:18:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2022-11-20 12:18:59,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:18:59,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989471046] [2022-11-20 12:18:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:18:59,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:18:59,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:18:59,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5256405] [2022-11-20 12:18:59,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:18:59,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:18:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:59,682 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:18:59,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35bb718-cbc9-444b-9bfe-1bdf9aca535a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:19:02,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 12:19:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:19:02,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 12:19:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates...