./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:23:43,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:23:43,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:23:43,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:23:43,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:23:43,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:23:43,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:23:43,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:23:43,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:23:43,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:23:43,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:23:43,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:23:43,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:23:43,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:23:43,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:23:43,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:23:43,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:23:43,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:23:43,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:23:43,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:23:43,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:23:43,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:23:43,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:23:43,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:23:43,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:23:43,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:23:43,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:23:43,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:23:43,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:23:43,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:23:43,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:23:43,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:23:43,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:23:43,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:23:43,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:23:43,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:23:43,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:23:43,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:23:43,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:23:43,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:23:43,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:23:43,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:23:43,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:23:43,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:23:43,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:23:43,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:23:43,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:23:43,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:23:43,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:23:43,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:23:43,535 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:23:43,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:23:43,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:23:43,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:23:43,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:23:43,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:23:43,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:23:43,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:23:43,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:23:43,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:23:43,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:23:43,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:23:43,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:23:43,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:23:43,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:23:43,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:23:43,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:23:43,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:23:43,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:23:43,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:23:43,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:23:43,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:23:43,540 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:23:43,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:23:43,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:23:43,540 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_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 [2022-11-16 11:23:43,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:23:43,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:23:43,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:23:43,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:23:43,879 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:23:43,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2022-11-16 11:23:43,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/data/7df60ad62/cabc8cf0300149c4bba45aadf723040e/FLAGb05941b5b [2022-11-16 11:23:44,466 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:23:44,467 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2022-11-16 11:23:44,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/data/7df60ad62/cabc8cf0300149c4bba45aadf723040e/FLAGb05941b5b [2022-11-16 11:23:44,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/data/7df60ad62/cabc8cf0300149c4bba45aadf723040e [2022-11-16 11:23:44,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:23:44,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:23:44,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:23:44,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:23:44,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:23:44,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:23:44" (1/1) ... [2022-11-16 11:23:44,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3796c729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:44, skipping insertion in model container [2022-11-16 11:23:44,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:23:44" (1/1) ... [2022-11-16 11:23:44,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:23:44,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:23:45,045 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[728,741] [2022-11-16 11:23:45,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:23:45,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:23:45,113 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[728,741] [2022-11-16 11:23:45,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:23:45,157 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:23:45,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45 WrapperNode [2022-11-16 11:23:45,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:23:45,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:23:45,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:23:45,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:23:45,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,213 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 154 [2022-11-16 11:23:45,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:23:45,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:23:45,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:23:45,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:23:45,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:23:45,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:23:45,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:23:45,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:23:45,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (1/1) ... [2022-11-16 11:23:45,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:23:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:45,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:23:45,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:23:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:23:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:23:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-16 11:23:45,322 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-16 11:23:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:23:45,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:23:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:23:45,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:23:45,403 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:23:45,405 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:23:45,906 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:23:45,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:23:45,922 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:23:45,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:23:45 BoogieIcfgContainer [2022-11-16 11:23:45,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:23:45,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:23:45,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:23:45,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:23:45,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:23:44" (1/3) ... [2022-11-16 11:23:45,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494370ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:23:45, skipping insertion in model container [2022-11-16 11:23:45,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:23:45" (2/3) ... [2022-11-16 11:23:45,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494370ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:23:45, skipping insertion in model container [2022-11-16 11:23:45,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:23:45" (3/3) ... [2022-11-16 11:23:45,940 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2022-11-16 11:23:45,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:23:45,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:23:46,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:23:46,020 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;@4213b45d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:23:46,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:23:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 65 states have internal predecessors, (103), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:23:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:23:46,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:46,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:46,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1903642572, now seen corresponding path program 1 times [2022-11-16 11:23:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:46,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871255816] [2022-11-16 11:23:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:23:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:23:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871255816] [2022-11-16 11:23:46,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871255816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:46,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:46,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:23:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701472755] [2022-11-16 11:23:46,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:46,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:23:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:46,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:23:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:23:46,590 INFO L87 Difference]: Start difference. First operand has 72 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 65 states have internal predecessors, (103), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:46,683 INFO L93 Difference]: Finished difference Result 173 states and 278 transitions. [2022-11-16 11:23:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:23:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-11-16 11:23:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:46,699 INFO L225 Difference]: With dead ends: 173 [2022-11-16 11:23:46,699 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 11:23:46,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:23:46,705 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:46,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 206 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 11:23:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-16 11:23:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:23:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2022-11-16 11:23:46,756 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 42 [2022-11-16 11:23:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:46,758 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2022-11-16 11:23:46,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2022-11-16 11:23:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:23:46,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:46,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:46,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:23:46,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1827281510, now seen corresponding path program 1 times [2022-11-16 11:23:46,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240052660] [2022-11-16 11:23:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:46,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:23:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:23:46,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:46,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240052660] [2022-11-16 11:23:46,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240052660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:46,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:46,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:23:46,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588642524] [2022-11-16 11:23:46,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:46,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:46,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:46,938 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:46,979 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2022-11-16 11:23:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-11-16 11:23:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:46,981 INFO L225 Difference]: With dead ends: 103 [2022-11-16 11:23:46,981 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 11:23:46,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:23:46,983 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 84 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:46,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 286 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 11:23:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-16 11:23:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 59 states have internal predecessors, (88), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:23:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2022-11-16 11:23:46,993 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 44 [2022-11-16 11:23:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:46,993 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2022-11-16 11:23:46,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2022-11-16 11:23:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:23:46,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:46,996 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:46,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:23:46,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1240475496, now seen corresponding path program 1 times [2022-11-16 11:23:46,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:46,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109897956] [2022-11-16 11:23:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:23:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:47,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109897956] [2022-11-16 11:23:47,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109897956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:47,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024898217] [2022-11-16 11:23:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:47,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:47,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:47,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:23:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:23:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:23:47,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:47,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024898217] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:47,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:47,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-11-16 11:23:47,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831204146] [2022-11-16 11:23:47,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:47,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:23:47,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:23:47,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:23:47,878 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:48,033 INFO L93 Difference]: Finished difference Result 110 states and 162 transitions. [2022-11-16 11:23:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-11-16 11:23:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:48,044 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:23:48,045 INFO L226 Difference]: Without dead ends: 105 [2022-11-16 11:23:48,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:23:48,048 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 97 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:48,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 524 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:23:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-16 11:23:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2022-11-16 11:23:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 94 states have internal predecessors, (140), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:23:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 153 transitions. [2022-11-16 11:23:48,074 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 153 transitions. Word has length 44 [2022-11-16 11:23:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:48,075 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 153 transitions. [2022-11-16 11:23:48,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 153 transitions. [2022-11-16 11:23:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:23:48,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:48,085 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:48,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:48,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:48,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1082466642, now seen corresponding path program 1 times [2022-11-16 11:23:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:48,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503714277] [2022-11-16 11:23:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:48,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:48,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:48,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:23:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:48,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503714277] [2022-11-16 11:23:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503714277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933336109] [2022-11-16 11:23:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:48,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:48,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:48,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:23:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:23:48,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:23:48,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933336109] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:48,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:48,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 7] total 12 [2022-11-16 11:23:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065109241] [2022-11-16 11:23:48,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:48,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:23:48,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:23:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:23:48,753 INFO L87 Difference]: Start difference. First operand 102 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:48,821 INFO L93 Difference]: Finished difference Result 119 states and 171 transitions. [2022-11-16 11:23:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:23:48,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-16 11:23:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:48,824 INFO L225 Difference]: With dead ends: 119 [2022-11-16 11:23:48,825 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 11:23:48,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:48,826 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 16 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:48,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 365 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 11:23:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-16 11:23:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.4563106796116505) internal successors, (150), 103 states have internal predecessors, (150), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:23:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 163 transitions. [2022-11-16 11:23:48,842 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 163 transitions. Word has length 46 [2022-11-16 11:23:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:48,843 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 163 transitions. [2022-11-16 11:23:48,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 163 transitions. [2022-11-16 11:23:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:23:48,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:48,846 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:48,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:23:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-16 11:23:49,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1025208340, now seen corresponding path program 1 times [2022-11-16 11:23:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869492501] [2022-11-16 11:23:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:23:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:23:49,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869492501] [2022-11-16 11:23:49,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869492501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:49,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:49,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:23:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612035699] [2022-11-16 11:23:49,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:23:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:23:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:49,175 INFO L87 Difference]: Start difference. First operand 111 states and 163 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:49,210 INFO L93 Difference]: Finished difference Result 117 states and 168 transitions. [2022-11-16 11:23:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:23:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-16 11:23:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:49,211 INFO L225 Difference]: With dead ends: 117 [2022-11-16 11:23:49,211 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 11:23:49,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:49,213 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:49,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 11:23:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-16 11:23:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 98 states have internal predecessors, (141), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:23:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 154 transitions. [2022-11-16 11:23:49,222 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 154 transitions. Word has length 46 [2022-11-16 11:23:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:49,222 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 154 transitions. [2022-11-16 11:23:49,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 154 transitions. [2022-11-16 11:23:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:23:49,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:49,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:49,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:23:49,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1102284953, now seen corresponding path program 1 times [2022-11-16 11:23:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:49,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699477685] [2022-11-16 11:23:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:49,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:23:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:49,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699477685] [2022-11-16 11:23:49,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699477685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614655192] [2022-11-16 11:23:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:49,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:49,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:49,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:23:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:23:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:49,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:49,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614655192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:49,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:49,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 6] total 13 [2022-11-16 11:23:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827140496] [2022-11-16 11:23:49,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:49,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:23:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:23:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:23:49,655 INFO L87 Difference]: Start difference. First operand 106 states and 154 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:23:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:50,264 INFO L93 Difference]: Finished difference Result 409 states and 629 transitions. [2022-11-16 11:23:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:23:50,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 48 [2022-11-16 11:23:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:50,269 INFO L225 Difference]: With dead ends: 409 [2022-11-16 11:23:50,269 INFO L226 Difference]: Without dead ends: 299 [2022-11-16 11:23:50,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:23:50,274 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 302 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:50,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 795 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:23:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-16 11:23:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 134. [2022-11-16 11:23:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 120 states have (on average 1.425) internal successors, (171), 121 states have internal predecessors, (171), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-16 11:23:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 202 transitions. [2022-11-16 11:23:50,294 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 202 transitions. Word has length 48 [2022-11-16 11:23:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:50,294 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 202 transitions. [2022-11-16 11:23:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:23:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 202 transitions. [2022-11-16 11:23:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:23:50,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:50,296 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:50,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:23:50,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:50,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2055268038, now seen corresponding path program 1 times [2022-11-16 11:23:50,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494349752] [2022-11-16 11:23:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:50,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:50,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:23:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:50,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:23:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:23:50,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494349752] [2022-11-16 11:23:50,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494349752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018748700] [2022-11-16 11:23:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:50,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:50,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:50,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:23:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:23:50,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:23:50,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:50,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018748700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:50,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:23:50,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-16 11:23:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464928792] [2022-11-16 11:23:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:50,689 INFO L87 Difference]: Start difference. First operand 134 states and 202 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:23:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:50,753 INFO L93 Difference]: Finished difference Result 264 states and 398 transitions. [2022-11-16 11:23:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-11-16 11:23:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:50,757 INFO L225 Difference]: With dead ends: 264 [2022-11-16 11:23:50,758 INFO L226 Difference]: Without dead ends: 148 [2022-11-16 11:23:50,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:23:50,760 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 19 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:50,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 238 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-16 11:23:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2022-11-16 11:23:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 125 states have (on average 1.424) internal successors, (178), 127 states have internal predecessors, (178), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2022-11-16 11:23:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 213 transitions. [2022-11-16 11:23:50,797 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 213 transitions. Word has length 55 [2022-11-16 11:23:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:50,798 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 213 transitions. [2022-11-16 11:23:50,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:23:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 213 transitions. [2022-11-16 11:23:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 11:23:50,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:50,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:50,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:51,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1277528378, now seen corresponding path program 1 times [2022-11-16 11:23:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825964938] [2022-11-16 11:23:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:23:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:23:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825964938] [2022-11-16 11:23:51,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825964938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:51,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003780057] [2022-11-16 11:23:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:51,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:51,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:51,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:23:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:23:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:51,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:51,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003780057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:51,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:23:51,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-16 11:23:51,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264333565] [2022-11-16 11:23:51,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:51,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:51,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:51,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:51,260 INFO L87 Difference]: Start difference. First operand 140 states and 213 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:23:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:51,332 INFO L93 Difference]: Finished difference Result 290 states and 445 transitions. [2022-11-16 11:23:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-11-16 11:23:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:51,337 INFO L225 Difference]: With dead ends: 290 [2022-11-16 11:23:51,337 INFO L226 Difference]: Without dead ends: 159 [2022-11-16 11:23:51,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:23:51,338 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 19 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:51,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 243 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-16 11:23:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2022-11-16 11:23:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 139 states have (on average 1.4172661870503598) internal successors, (197), 143 states have internal predecessors, (197), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-16 11:23:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2022-11-16 11:23:51,366 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 57 [2022-11-16 11:23:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:51,367 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2022-11-16 11:23:51,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:23:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2022-11-16 11:23:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 11:23:51,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:51,370 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:51,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:23:51,577 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash -836757412, now seen corresponding path program 1 times [2022-11-16 11:23:51,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:51,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895248417] [2022-11-16 11:23:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 11:23:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-16 11:23:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:51,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895248417] [2022-11-16 11:23:51,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895248417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203133402] [2022-11-16 11:23:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:51,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:51,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:51,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:23:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:51,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:23:51,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:51,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203133402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:51,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:51,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:23:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610329432] [2022-11-16 11:23:51,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:23:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:23:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:23:51,976 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:23:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:52,173 INFO L93 Difference]: Finished difference Result 399 states and 636 transitions. [2022-11-16 11:23:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:23:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-11-16 11:23:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:52,177 INFO L225 Difference]: With dead ends: 399 [2022-11-16 11:23:52,177 INFO L226 Difference]: Without dead ends: 251 [2022-11-16 11:23:52,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:23:52,180 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 159 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:52,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 384 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:23:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-16 11:23:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 182. [2022-11-16 11:23:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 169 states have internal predecessors, (239), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-16 11:23:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 279 transitions. [2022-11-16 11:23:52,211 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 279 transitions. Word has length 60 [2022-11-16 11:23:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:52,211 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 279 transitions. [2022-11-16 11:23:52,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:23:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 279 transitions. [2022-11-16 11:23:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:23:52,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:52,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:52,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:52,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1256078554, now seen corresponding path program 1 times [2022-11-16 11:23:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:52,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479167820] [2022-11-16 11:23:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:52,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:52,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:23:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479167820] [2022-11-16 11:23:52,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479167820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094201295] [2022-11-16 11:23:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:52,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:52,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:52,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:23:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:52,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:23:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:52,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:23:52,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094201295] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:52,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:52,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-16 11:23:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91766968] [2022-11-16 11:23:52,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:23:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:23:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:23:52,783 INFO L87 Difference]: Start difference. First operand 182 states and 279 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:52,812 INFO L93 Difference]: Finished difference Result 236 states and 352 transitions. [2022-11-16 11:23:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:23:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2022-11-16 11:23:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:52,815 INFO L225 Difference]: With dead ends: 236 [2022-11-16 11:23:52,815 INFO L226 Difference]: Without dead ends: 187 [2022-11-16 11:23:52,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:23:52,816 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 40 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:52,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 143 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-16 11:23:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-11-16 11:23:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 165 states have (on average 1.4363636363636363) internal successors, (237), 169 states have internal predecessors, (237), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-16 11:23:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 277 transitions. [2022-11-16 11:23:52,840 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 277 transitions. Word has length 61 [2022-11-16 11:23:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:52,840 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 277 transitions. [2022-11-16 11:23:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 277 transitions. [2022-11-16 11:23:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:23:52,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:52,842 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:52,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:53,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:23:53,048 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1767390517, now seen corresponding path program 1 times [2022-11-16 11:23:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:53,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815042423] [2022-11-16 11:23:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:53,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:23:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-16 11:23:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:53,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 11:23:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:23:53,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815042423] [2022-11-16 11:23:53,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815042423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598106098] [2022-11-16 11:23:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:53,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:53,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:53,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:53,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:23:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:23:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:23:53,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:23:54,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598106098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:54,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:54,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 26 [2022-11-16 11:23:54,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324287555] [2022-11-16 11:23:54,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:54,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:23:54,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:23:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:23:54,029 INFO L87 Difference]: Start difference. First operand 182 states and 277 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 4 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:23:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:55,742 INFO L93 Difference]: Finished difference Result 340 states and 507 transitions. [2022-11-16 11:23:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:23:55,743 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 4 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) Word has length 61 [2022-11-16 11:23:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:55,744 INFO L225 Difference]: With dead ends: 340 [2022-11-16 11:23:55,744 INFO L226 Difference]: Without dead ends: 156 [2022-11-16 11:23:55,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:23:55,746 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 196 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:55,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1098 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:23:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-16 11:23:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2022-11-16 11:23:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 90 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 11:23:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-11-16 11:23:55,776 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 61 [2022-11-16 11:23:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:55,776 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-11-16 11:23:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 4 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:23:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-11-16 11:23:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:23:55,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:55,778 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:55,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:23:55,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1474347247, now seen corresponding path program 1 times [2022-11-16 11:23:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443628887] [2022-11-16 11:23:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:55,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:23:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443628887] [2022-11-16 11:23:56,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443628887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939722468] [2022-11-16 11:23:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:56,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:56,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:23:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:23:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:56,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:56,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939722468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:56,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:56,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-16 11:23:56,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472761967] [2022-11-16 11:23:56,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:56,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:23:56,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:23:56,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:23:56,482 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 17 states have internal predecessors, (77), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:23:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:56,646 INFO L93 Difference]: Finished difference Result 203 states and 290 transitions. [2022-11-16 11:23:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:23:56,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 17 states have internal predecessors, (77), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 62 [2022-11-16 11:23:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:56,648 INFO L225 Difference]: With dead ends: 203 [2022-11-16 11:23:56,648 INFO L226 Difference]: Without dead ends: 169 [2022-11-16 11:23:56,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:23:56,649 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 202 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:56,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 935 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:23:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-16 11:23:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2022-11-16 11:23:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 104 states have internal predecessors, (141), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-16 11:23:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-11-16 11:23:56,666 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 62 [2022-11-16 11:23:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:56,666 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-11-16 11:23:56,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 17 states have internal predecessors, (77), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:23:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-11-16 11:23:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:23:56,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:56,668 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:56,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:56,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:56,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1897049073, now seen corresponding path program 1 times [2022-11-16 11:23:56,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:56,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652599133] [2022-11-16 11:23:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:56,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:56,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:23:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652599133] [2022-11-16 11:23:57,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652599133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:57,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:57,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:23:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979738547] [2022-11-16 11:23:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:23:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:57,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:23:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:23:57,008 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:57,085 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2022-11-16 11:23:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:57,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-11-16 11:23:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:57,087 INFO L225 Difference]: With dead ends: 164 [2022-11-16 11:23:57,087 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 11:23:57,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:23:57,089 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 4 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:57,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 506 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 11:23:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-16 11:23:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 104 states have internal predecessors, (141), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-16 11:23:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 160 transitions. [2022-11-16 11:23:57,103 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 160 transitions. Word has length 62 [2022-11-16 11:23:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:57,104 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 160 transitions. [2022-11-16 11:23:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 160 transitions. [2022-11-16 11:23:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:23:57,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:57,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:57,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:23:57,106 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 973460913, now seen corresponding path program 1 times [2022-11-16 11:23:57,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:57,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910866282] [2022-11-16 11:23:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:23:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:23:57,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910866282] [2022-11-16 11:23:57,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910866282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:57,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:57,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:23:57,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43749184] [2022-11-16 11:23:57,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:57,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:23:57,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:57,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:23:57,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:57,291 INFO L87 Difference]: Start difference. First operand 115 states and 160 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:57,452 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2022-11-16 11:23:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:23:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-11-16 11:23:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:57,454 INFO L225 Difference]: With dead ends: 223 [2022-11-16 11:23:57,455 INFO L226 Difference]: Without dead ends: 197 [2022-11-16 11:23:57,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:23:57,456 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 124 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:57,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 615 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:23:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-16 11:23:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2022-11-16 11:23:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 132 states have internal predecessors, (173), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-16 11:23:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 199 transitions. [2022-11-16 11:23:57,474 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 199 transitions. Word has length 68 [2022-11-16 11:23:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:57,475 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 199 transitions. [2022-11-16 11:23:57,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 199 transitions. [2022-11-16 11:23:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:23:57,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:57,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:57,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:23:57,477 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash -306402765, now seen corresponding path program 1 times [2022-11-16 11:23:57,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:57,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011574390] [2022-11-16 11:23:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:57,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:23:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:23:57,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011574390] [2022-11-16 11:23:57,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011574390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616153223] [2022-11-16 11:23:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:57,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:57,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:57,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:57,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:23:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:23:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:23:57,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 11:23:57,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616153223] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:57,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:57,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 6] total 11 [2022-11-16 11:23:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547451060] [2022-11-16 11:23:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:57,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:23:57,888 INFO L87 Difference]: Start difference. First operand 145 states and 199 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:57,915 INFO L93 Difference]: Finished difference Result 182 states and 247 transitions. [2022-11-16 11:23:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-11-16 11:23:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:57,917 INFO L225 Difference]: With dead ends: 182 [2022-11-16 11:23:57,917 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 11:23:57,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:23:57,920 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 81 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:57,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 134 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:23:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 11:23:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-11-16 11:23:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 114 states have internal predecessors, (148), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-16 11:23:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 166 transitions. [2022-11-16 11:23:57,933 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 166 transitions. Word has length 68 [2022-11-16 11:23:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:57,934 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 166 transitions. [2022-11-16 11:23:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 166 transitions. [2022-11-16 11:23:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:23:57,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:57,935 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:57,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:58,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:23:58,141 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1287918186, now seen corresponding path program 1 times [2022-11-16 11:23:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:58,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462167144] [2022-11-16 11:23:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:58,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:58,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:23:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:23:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:58,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462167144] [2022-11-16 11:23:58,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462167144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:58,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792954721] [2022-11-16 11:23:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:58,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:58,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:58,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:23:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:23:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:23:58,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:23:58,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792954721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:58,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:58,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-11-16 11:23:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789584019] [2022-11-16 11:23:58,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:23:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:23:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:58,548 INFO L87 Difference]: Start difference. First operand 124 states and 166 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 11:23:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:58,696 INFO L93 Difference]: Finished difference Result 242 states and 327 transitions. [2022-11-16 11:23:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:23:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-11-16 11:23:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:58,698 INFO L225 Difference]: With dead ends: 242 [2022-11-16 11:23:58,698 INFO L226 Difference]: Without dead ends: 206 [2022-11-16 11:23:58,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:23:58,699 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 243 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:58,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1250 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:23:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-16 11:23:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 144. [2022-11-16 11:23:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.3) internal successors, (169), 131 states have internal predecessors, (169), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (17), 8 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-16 11:23:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2022-11-16 11:23:58,718 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 73 [2022-11-16 11:23:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:58,719 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2022-11-16 11:23:58,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 11:23:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2022-11-16 11:23:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:23:58,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:58,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:58,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:23:58,926 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 8054508, now seen corresponding path program 1 times [2022-11-16 11:23:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514080301] [2022-11-16 11:23:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:58,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:23:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:23:59,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:59,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514080301] [2022-11-16 11:23:59,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514080301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:59,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:59,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:23:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143927908] [2022-11-16 11:23:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:23:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:23:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:23:59,179 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:59,373 INFO L93 Difference]: Finished difference Result 248 states and 332 transitions. [2022-11-16 11:23:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:23:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2022-11-16 11:23:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:59,375 INFO L225 Difference]: With dead ends: 248 [2022-11-16 11:23:59,375 INFO L226 Difference]: Without dead ends: 212 [2022-11-16 11:23:59,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:59,376 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 167 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:59,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 826 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:23:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-16 11:23:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2022-11-16 11:23:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.3) internal successors, (169), 131 states have internal predecessors, (169), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (17), 8 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-16 11:23:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2022-11-16 11:23:59,392 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 73 [2022-11-16 11:23:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:59,392 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2022-11-16 11:23:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:23:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2022-11-16 11:23:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:23:59,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:59,394 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:59,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:23:59,394 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:23:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1680889234, now seen corresponding path program 1 times [2022-11-16 11:23:59,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008789654] [2022-11-16 11:23:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:23:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:23:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:23:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:23:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:23:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:59,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008789654] [2022-11-16 11:23:59,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008789654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:59,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2424041] [2022-11-16 11:23:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:59,548 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:59,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:23:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:23:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:23:59,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:24:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2424041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:00,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:00,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 12] total 21 [2022-11-16 11:24:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945549380] [2022-11-16 11:24:00,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:00,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:24:00,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:24:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:24:00,044 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 11:24:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:00,770 INFO L93 Difference]: Finished difference Result 360 states and 495 transitions. [2022-11-16 11:24:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:24:00,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2022-11-16 11:24:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:00,772 INFO L225 Difference]: With dead ends: 360 [2022-11-16 11:24:00,773 INFO L226 Difference]: Without dead ends: 225 [2022-11-16 11:24:00,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:24:00,774 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 192 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:00,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 912 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:24:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-16 11:24:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 144. [2022-11-16 11:24:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 131 states have internal predecessors, (167), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (17), 8 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-16 11:24:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2022-11-16 11:24:00,795 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 73 [2022-11-16 11:24:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:00,796 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2022-11-16 11:24:00,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 11:24:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2022-11-16 11:24:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 11:24:00,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:00,797 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:00,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:01,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:24:01,003 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:24:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1872287026, now seen corresponding path program 1 times [2022-11-16 11:24:01,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:01,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143791445] [2022-11-16 11:24:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:01,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:01,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:24:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:01,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:24:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:24:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 11:24:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:24:01,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143791445] [2022-11-16 11:24:01,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143791445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304147532] [2022-11-16 11:24:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:01,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:01,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:01,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:24:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:24:01,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:24:01,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304147532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:01,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:01,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 18 [2022-11-16 11:24:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439705729] [2022-11-16 11:24:01,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:24:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:24:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:24:01,647 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 16 states have internal predecessors, (86), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:24:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:02,474 INFO L93 Difference]: Finished difference Result 281 states and 387 transitions. [2022-11-16 11:24:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:24:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 16 states have internal predecessors, (86), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2022-11-16 11:24:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:02,475 INFO L225 Difference]: With dead ends: 281 [2022-11-16 11:24:02,475 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:24:02,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:24:02,477 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 255 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:02,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 180 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:24:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:24:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:24:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:24:02,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2022-11-16 11:24:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:02,478 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:24:02,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 16 states have internal predecessors, (86), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:24:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:24:02,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:24:02,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 11:24:02,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:02,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:02,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 11:24:21,057 INFO L899 garLoopResultBuilder]: For program point L77-1(line 77) no Hoare annotation was computed. [2022-11-16 11:24:21,058 INFO L899 garLoopResultBuilder]: For program point L77-3(line 77) no Hoare annotation was computed. [2022-11-16 11:24:21,058 INFO L895 garLoopResultBuilder]: At program point L73(lines 28 81) the Hoare annotation is: (let ((.cse0 (= |base2flt_#in~m| 1)) (.cse4 (not (= |base2flt_#in~m| 0)))) (let ((.cse1 (or (< (mod base2flt_~__retres4~0 4294967296) 1) .cse4)) (.cse2 (or .cse4 (< (mod |base2flt_#res| 4294967296) 1))) (.cse3 (not .cse0))) (and (or .cse0 (and (or (not (= |base2flt_#in~m| |base2flt_#in~e|)) (not (= |base2flt_#in~e| 0))) .cse1 .cse2 .cse3)) (or (and .cse1 .cse2 .cse3) (<= base2flt_~e |base2flt_#in~e|))))) [2022-11-16 11:24:21,058 INFO L895 garLoopResultBuilder]: At program point L57-2(lines 57 72) the Hoare annotation is: (let ((.cse0 (not (= |base2flt_#in~m| 0)))) (and (or (not (= |base2flt_#in~m| |base2flt_#in~e|)) (not (= |base2flt_#in~e| 0))) (<= |base2flt_#in~e| base2flt_~e) (or (< (mod base2flt_~__retres4~0 4294967296) 1) .cse0) (or .cse0 (< (mod |base2flt_#res| 4294967296) 1)) (not (= |base2flt_#in~m| 1)))) [2022-11-16 11:24:21,058 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 34) no Hoare annotation was computed. [2022-11-16 11:24:21,058 INFO L899 garLoopResultBuilder]: For program point L58(lines 57 72) no Hoare annotation was computed. [2022-11-16 11:24:21,058 INFO L902 garLoopResultBuilder]: At program point base2fltENTRY(lines 24 82) the Hoare annotation is: true [2022-11-16 11:24:21,058 INFO L895 garLoopResultBuilder]: At program point L79(lines 28 81) the Hoare annotation is: (let ((.cse0 (or (not (= |base2flt_#in~m| |base2flt_#in~e|)) (not (= |base2flt_#in~e| 0)))) (.cse1 (or (not (= |base2flt_#in~m| 0)) (< (mod |base2flt_#res| 4294967296) 1)))) (or (and (<= base2flt_~e |base2flt_#in~e|) .cse0 .cse1) (and (= base2flt_~e |base2flt_#in~e|) (= base2flt_~m |base2flt_#in~m|) (= base2flt_~__retres4~0 0)) (and .cse0 .cse1 (not (= |base2flt_#in~m| 1))))) [2022-11-16 11:24:21,059 INFO L899 garLoopResultBuilder]: For program point L38(lines 37 52) no Hoare annotation was computed. [2022-11-16 11:24:21,059 INFO L899 garLoopResultBuilder]: For program point base2fltFINAL(lines 24 82) no Hoare annotation was computed. [2022-11-16 11:24:21,059 INFO L899 garLoopResultBuilder]: For program point L59(lines 57 72) no Hoare annotation was computed. [2022-11-16 11:24:21,059 INFO L899 garLoopResultBuilder]: For program point base2fltEXIT(lines 24 82) no Hoare annotation was computed. [2022-11-16 11:24:21,059 INFO L899 garLoopResultBuilder]: For program point L47(lines 47 51) no Hoare annotation was computed. [2022-11-16 11:24:21,059 INFO L895 garLoopResultBuilder]: At program point L47-1(lines 37 52) the Hoare annotation is: (let ((.cse0 (not (= |base2flt_#in~m| 0)))) (and (<= base2flt_~e |base2flt_#in~e|) (or (not (= |base2flt_#in~m| |base2flt_#in~e|)) (not (= |base2flt_#in~e| 0))) (or (< (mod base2flt_~__retres4~0 4294967296) 1) .cse0) (or .cse0 (< (mod |base2flt_#res| 4294967296) 1)))) [2022-11-16 11:24:21,060 INFO L899 garLoopResultBuilder]: For program point L76-1(line 76) no Hoare annotation was computed. [2022-11-16 11:24:21,060 INFO L899 garLoopResultBuilder]: For program point L76-3(lines 28 81) no Hoare annotation was computed. [2022-11-16 11:24:21,060 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 75) no Hoare annotation was computed. [2022-11-16 11:24:21,060 INFO L895 garLoopResultBuilder]: At program point L217(lines 147 219) the Hoare annotation is: (or (and (< (mod |ULTIMATE.start_mulflt_#res#1| 4294967296) 1) (< (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 1) (< (mod |ULTIMATE.start_mulflt_~__retres10~1#1| 4294967296) 1)) (and (= |ULTIMATE.start_main_~sb~0#1| 1) (= |ULTIMATE.start_main_~tmp~2#1| 1)) (<= (+ |ULTIMATE.start_main_~sb~0#1| 1) 0)) [2022-11-16 11:24:21,060 INFO L899 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2022-11-16 11:24:21,060 INFO L899 garLoopResultBuilder]: For program point L176-2(line 176) no Hoare annotation was computed. [2022-11-16 11:24:21,060 INFO L899 garLoopResultBuilder]: For program point L176-4(line 176) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point L185(lines 185 190) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point L243(lines 243 252) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point L243-2(lines 243 252) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point L260(lines 260 264) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point L194(lines 194 211) no Hoare annotation was computed. [2022-11-16 11:24:21,061 INFO L899 garLoopResultBuilder]: For program point L260-2(lines 260 264) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L194-2(lines 194 211) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L203(lines 203 208) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L179(lines 179 184) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L171(line 171) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L171-2(line 171) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L171-4(line 171) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L246(lines 246 250) no Hoare annotation was computed. [2022-11-16 11:24:21,062 INFO L899 garLoopResultBuilder]: For program point L213(line 213) no Hoare annotation was computed. [2022-11-16 11:24:21,063 INFO L899 garLoopResultBuilder]: For program point L246-2(lines 246 250) no Hoare annotation was computed. [2022-11-16 11:24:21,063 INFO L899 garLoopResultBuilder]: For program point L213-2(line 213) no Hoare annotation was computed. [2022-11-16 11:24:21,063 INFO L899 garLoopResultBuilder]: For program point L213-4(lines 157 218) no Hoare annotation was computed. [2022-11-16 11:24:21,063 INFO L902 garLoopResultBuilder]: At program point L238(line 238) the Hoare annotation is: true [2022-11-16 11:24:21,063 INFO L899 garLoopResultBuilder]: For program point L238-1(line 238) no Hoare annotation was computed. [2022-11-16 11:24:21,063 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-16 11:24:21,064 INFO L899 garLoopResultBuilder]: For program point L214-1(line 214) no Hoare annotation was computed. [2022-11-16 11:24:21,064 INFO L899 garLoopResultBuilder]: For program point L214-3(line 214) no Hoare annotation was computed. [2022-11-16 11:24:21,064 INFO L895 garLoopResultBuilder]: At program point L239(line 239) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2022-11-16 11:24:21,064 INFO L899 garLoopResultBuilder]: For program point L239-1(line 239) no Hoare annotation was computed. [2022-11-16 11:24:21,064 INFO L899 garLoopResultBuilder]: For program point L173(line 173) no Hoare annotation was computed. [2022-11-16 11:24:21,064 INFO L899 garLoopResultBuilder]: For program point L173-2(line 173) no Hoare annotation was computed. [2022-11-16 11:24:21,064 INFO L899 garLoopResultBuilder]: For program point L173-4(lines 157 218) no Hoare annotation was computed. [2022-11-16 11:24:21,065 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-16 11:24:21,065 INFO L899 garLoopResultBuilder]: For program point L256(lines 256 272) no Hoare annotation was computed. [2022-11-16 11:24:21,065 INFO L899 garLoopResultBuilder]: For program point L256-1(lines 256 272) no Hoare annotation was computed. [2022-11-16 11:24:21,065 INFO L895 garLoopResultBuilder]: At program point L240(line 240) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2022-11-16 11:24:21,065 INFO L899 garLoopResultBuilder]: For program point L240-1(line 240) no Hoare annotation was computed. [2022-11-16 11:24:21,065 INFO L899 garLoopResultBuilder]: For program point L174-1(line 174) no Hoare annotation was computed. [2022-11-16 11:24:21,065 INFO L899 garLoopResultBuilder]: For program point L174-3(line 174) no Hoare annotation was computed. [2022-11-16 11:24:21,066 INFO L899 garLoopResultBuilder]: For program point L257(lines 257 266) no Hoare annotation was computed. [2022-11-16 11:24:21,066 INFO L895 garLoopResultBuilder]: At program point L257-2(lines 257 266) the Hoare annotation is: (and (= 0 |ULTIMATE.start_main_~tmp___1~0#1|) (= 0 |ULTIMATE.start_main_~tmp___0~0#1|)) [2022-11-16 11:24:21,066 INFO L899 garLoopResultBuilder]: For program point L158(lines 158 164) no Hoare annotation was computed. [2022-11-16 11:24:21,066 INFO L899 garLoopResultBuilder]: For program point L158-2(lines 157 218) no Hoare annotation was computed. [2022-11-16 11:24:21,066 INFO L895 garLoopResultBuilder]: At program point L216(lines 157 218) the Hoare annotation is: (or (and (< (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 1) (< (mod |ULTIMATE.start_mulflt_~__retres10~1#1| 4294967296) 1)) (and (= |ULTIMATE.start_main_~sb~0#1| 1) (= |ULTIMATE.start_main_~tmp~2#1| 1)) (<= (+ |ULTIMATE.start_main_~sb~0#1| 1) 0)) [2022-11-16 11:24:21,066 INFO L902 garLoopResultBuilder]: At program point L274(lines 220 276) the Hoare annotation is: true [2022-11-16 11:24:21,067 INFO L895 garLoopResultBuilder]: At program point L241(line 241) the Hoare annotation is: (or (= |ULTIMATE.start_main_~zero~0#1| 0) (and (= |ULTIMATE.start_main_~a~0#1| 0) (< (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 1))) [2022-11-16 11:24:21,067 INFO L899 garLoopResultBuilder]: For program point L241-1(line 241) no Hoare annotation was computed. [2022-11-16 11:24:21,067 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2022-11-16 11:24:21,067 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2022-11-16 11:24:21,067 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 20) the Hoare annotation is: true [2022-11-16 11:24:21,067 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 20) no Hoare annotation was computed. [2022-11-16 11:24:21,067 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 20) no Hoare annotation was computed. [2022-11-16 11:24:21,068 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-16 11:24:21,071 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:21,073 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:24:21,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:24:21 BoogieIcfgContainer [2022-11-16 11:24:21,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:24:21,091 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:24:21,091 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:24:21,092 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:24:21,092 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:23:45" (3/4) ... [2022-11-16 11:24:21,095 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 11:24:21,101 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2022-11-16 11:24:21,102 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-16 11:24:21,107 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2022-11-16 11:24:21,108 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2022-11-16 11:24:21,108 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-16 11:24:21,109 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 11:24:21,132 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((e <= \old(e) && (!(\old(m) == \old(e)) || !(\old(e) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1)) || ((e == \old(e) && m == \old(m)) && __retres4 == 0)) || (((!(\old(m) == \old(e)) || !(\old(e) == 0)) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1)) [2022-11-16 11:24:21,133 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((e <= \old(e) && (!(\old(m) == \old(e)) || !(\old(e) == 0))) && (__retres4 % 4294967296 < 1 || !(\old(m) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1) [2022-11-16 11:24:21,133 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(m) == \old(e)) || !(\old(e) == 0)) && \old(e) <= e) && (__retres4 % 4294967296 < 1 || !(\old(m) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1) [2022-11-16 11:24:21,133 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\old(m) == 1 || ((((!(\old(m) == \old(e)) || !(\old(e) == 0)) && (__retres4 % 4294967296 < 1 || !(\old(m) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1))) && ((((__retres4 % 4294967296 < 1 || !(\old(m) == 0)) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1)) || e <= \old(e)) [2022-11-16 11:24:21,134 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((\result % 4294967296 < 1 && zero % 4294967296 < 1) && __retres10 % 4294967296 < 1) || (sb == 1 && tmp == 1)) || sb + 1 <= 0 [2022-11-16 11:24:21,154 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:24:21,155 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:24:21,155 INFO L158 Benchmark]: Toolchain (without parser) took 36355.66ms. Allocated memory was 125.8MB in the beginning and 553.6MB in the end (delta: 427.8MB). Free memory was 89.5MB in the beginning and 509.6MB in the end (delta: -420.1MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2022-11-16 11:24:21,156 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 125.8MB. Free memory was 99.0MB in the beginning and 99.0MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:24:21,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.48ms. Allocated memory is still 125.8MB. Free memory was 89.5MB in the beginning and 97.2MB in the end (delta: -7.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 11:24:21,156 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.29ms. Allocated memory is still 125.8MB. Free memory was 97.2MB in the beginning and 95.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:24:21,157 INFO L158 Benchmark]: Boogie Preprocessor took 32.55ms. Allocated memory is still 125.8MB. Free memory was 95.2MB in the beginning and 93.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:24:21,157 INFO L158 Benchmark]: RCFGBuilder took 680.79ms. Allocated memory is still 125.8MB. Free memory was 93.7MB in the beginning and 74.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-16 11:24:21,157 INFO L158 Benchmark]: TraceAbstraction took 35159.88ms. Allocated memory was 125.8MB in the beginning and 553.6MB in the end (delta: 427.8MB). Free memory was 74.2MB in the beginning and 514.8MB in the end (delta: -440.6MB). Peak memory consumption was 305.5MB. Max. memory is 16.1GB. [2022-11-16 11:24:21,158 INFO L158 Benchmark]: Witness Printer took 63.34ms. Allocated memory is still 553.6MB. Free memory was 514.8MB in the beginning and 509.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-16 11:24:21,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 125.8MB. Free memory was 99.0MB in the beginning and 99.0MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.48ms. Allocated memory is still 125.8MB. Free memory was 89.5MB in the beginning and 97.2MB in the end (delta: -7.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.29ms. Allocated memory is still 125.8MB. Free memory was 97.2MB in the beginning and 95.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.55ms. Allocated memory is still 125.8MB. Free memory was 95.2MB in the beginning and 93.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 680.79ms. Allocated memory is still 125.8MB. Free memory was 93.7MB in the beginning and 74.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 35159.88ms. Allocated memory was 125.8MB in the beginning and 553.6MB in the end (delta: 427.8MB). Free memory was 74.2MB in the beginning and 514.8MB in the end (delta: -440.6MB). Peak memory consumption was 305.5MB. Max. memory is 16.1GB. * Witness Printer took 63.34ms. Allocated memory is still 553.6MB. Free memory was 514.8MB in the beginning and 509.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.1s, OverallIterations: 19, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 18.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2251 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2245 mSDsluCounter, 10105 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8458 mSDsCounter, 140 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3122 IncrementalHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 140 mSolverCounterUnsat, 1647 mSDtfsCounter, 3122 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1791 GetRequests, 1521 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=182occurred in iteration=9, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 630 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 217 PreInvPairs, 701 NumberOfFragments, 279 HoareAnnotationTreeSize, 217 FomulaSimplifications, 43352 FormulaSimplificationTreeSizeReduction, 16.2s HoareSimplificationTime, 14 FomulaSimplificationsInter, 265548 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1903 NumberOfCodeBlocks, 1903 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2532 ConstructedInterpolants, 0 QuantifiedInterpolants, 4830 SizeOfPredicates, 57 NumberOfNonLiveVariables, 2383 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 43 InterpolantComputations, 12 PerfectInterpolantSequences, 1155/1437 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (\old(m) == 1 || ((((!(\old(m) == \old(e)) || !(\old(e) == 0)) && (__retres4 % 4294967296 < 1 || !(\old(m) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1))) && ((((__retres4 % 4294967296 < 1 || !(\old(m) == 0)) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1)) || e <= \old(e)) - InvariantResult [Line: 220]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 157]: Loop Invariant Derived loop invariant: ((zero % 4294967296 < 1 && __retres10 % 4294967296 < 1) || (sb == 1 && tmp == 1)) || sb + 1 <= 0 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: (((\result % 4294967296 < 1 && zero % 4294967296 < 1) && __retres10 % 4294967296 < 1) || (sb == 1 && tmp == 1)) || sb + 1 <= 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((e <= \old(e) && (!(\old(m) == \old(e)) || !(\old(e) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1)) || ((e == \old(e) && m == \old(m)) && __retres4 == 0)) || (((!(\old(m) == \old(e)) || !(\old(e) == 0)) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1)) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((e <= \old(e) && (!(\old(m) == \old(e)) || !(\old(e) == 0))) && (__retres4 % 4294967296 < 1 || !(\old(m) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((!(\old(m) == \old(e)) || !(\old(e) == 0)) && \old(e) <= e) && (__retres4 % 4294967296 < 1 || !(\old(m) == 0))) && (!(\old(m) == 0) || \result % 4294967296 < 1)) && !(\old(m) == 1) RESULT: Ultimate proved your program to be correct! [2022-11-16 11:24:21,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5e707e-b83c-404c-a2aa-227103e406d1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE